Statistics Risk Rating - Insurance Classification Assignment

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User Generated

User

pvzobz99

Subject

Mathematics

Description

Data given(attached) is contains insurance classification, price and attributes of some cars in 1987. The aim of the study is to understand how insurance risk ratings and car attributes affect the price at which a car is sold. The variables in the data set are as follows:

1. Risk rating	-3, -2, -1, 0, 1, 2, 3.
2. Risk factor	Risky, neutral, safe
3. make	alfa-romero, audi, bmw, chevrolet, dodge, honda, isuzu, jaguar, mazda, mercedes-benz, mercury, mitsubishi, nissan, peugot, plymouth, porsche, renault, saab, subaru, toyota, volkswagen, volvo
4. fuel-type	diesel, gas.
5. aspiration	standard, turbo.
6. num-of-doors	four, two.
7. body-style	hardtop, wagon, sedan, hatchback, convertible.
8. drive-wheels	4wheel drive (4wd), forward wheel drive (fwd), rear wheel drive (rwd).
9. engine-location	front, rear.
10. wheel-base	continuous from 86.6 120.9.
11. length	continuous from 141.1 to 208.1.
12. width	continuous from 60.3 to 72.3.
13. height	continuous from 47.8 to 59.8.
14. curb-weight	continuous from 1488 to 4066.
15. engine-type	dohc, dohcv, l, ohc, ohcf, ohcv, rotor.
16. num-of-cylinders	eight, five, four, six, three, twelve, two.
17. engine-size	continuous from 61 to 326.
18. fuel-system	1bbl, 2bbl, 4bbl, idi, mfi, mpfi, spdi, spfi.
19. bore	continuous from 2.54 to 3.94.
20. stroke	continuous from 2.07 to 4.17.
21. compression-ratio	continuous from 7 to 23.
22. horsepower	continuous from 48 to 288.
23. peak-rpm	continuous from 4150 to 6600.
24. city-mpg	continuous from 13 to 49.
25. highway-mpg	continuous from 16 to 54.
26. price	continuous from 5118 to 45400.

We would like to understand how the variables interact with each other. Write a report that includes the following:

Calculate and interpret 95% confidence intervals of the proportion of cars that have four doors
Auto world magazine published an article on car efficiency in Dec 1987. The article claimed that the average highway mileage of cars in 1987 was higher than that in 1985. Test auto world’s hypothesis assuming that the average highway mileage in 1985 was 26 mpg.
Test the hypothesis that on average neutral-risk cars are more expensive than risky cars.
Test for the independence of the risk factor and wheel drive (fwd, rwd and 4wd)

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Risk rating Risk Factor 1 Risky 1 Risky 1 Risky 2 Risky 1 Risky 0 Neutral 0 Neutral 3 Risky 3 Risky 3 Risky 0 Neutral 0 Neutral 0 Neutral 0 Neutral 0 Neutral 2 Risky 0 Neutral 0 Neutral 2 Risky 1 Risky 1 Risky 1 Risky 2 Risky 1 Risky 1 Risky 1 Risky 2 Risky 1 Risky 1 Risky 1 Risky 1 Risky 1 Risky 1 Risky 1 Risky 1 Risky 1 Risky -1 Safe 3 Risky 3 Risky 2 Risky 1 Risky 3 Risky make toyota toyota honda honda honda honda honda porsche porsche porsche honda honda honda honda honda bmw bmw peugot mitsubishi honda dodge plymouth mitsubishi dodge plymouth dodge mitsubishi dodge plymouth dodge plymouth mitsubishi dodge plymouth dodge mitsubishi mitsubishi mitsubishi volkswagen volkswagen honda volkswagen fuel-type gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas aspiration std std std std std std std std std std std std std std std std std turbo std std std std std std std std std std std std std turbo turbo turbo turbo turbo std turbo std std std std num-of-doors two two two two two four four two two two two four two four four two four four two two two two two four four two two four four four four two two two two four four two two four two two body-style sedan hatchback hatchback hatchback hatchback sedan wagon hardtop hardtop convertible hatchback sedan hatchback sedan sedan sedan sedan sedan hatchback hatchback hatchback hatchback hatchback hatchback hatchback hatchback hatchback sedan sedan sedan sedan hatchback hatchback hatchback sedan sedan sedan hatchback hatchback sedan sedan convertible 0 0 2 2 2 1 3 2 1 -1 3 1 1 0 -2 -1 -2 -1 -1 -1 0 0 0 -1 2 2 2 3 2 3 2 1 1 1 1 1 1 1 1 2 0 0 0 Neutral Neutral Risky Risky Risky Risky Risky Risky Risky Safe Risky Risky Risky Neutral Safe Safe Safe Safe Safe Safe Neutral Neutral Neutral Safe Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Risky Neutral Neutral Neutral volkswagen volkswagen audi audi audi audi saab saab audi volvo porsche audi chevrolet chevrolet volvo volvo volvo volvo volvo volvo bmw bmw bmw volvo volkswagen volkswagen volkswagen saab saab saab saab nissan nissan nissan nissan nissan nissan nissan nissan nissan nissan nissan subaru gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas std std std std std std turbo turbo std std std turbo std std std std std std std turbo std std std turbo std std std std std std std std std std std std std std std std std std std four four four two four four two four four four two four two four four four four four four four four four two four two four four two four two four two two four two four four two four two four four four wagon sedan sedan sedan sedan sedan hatchback sedan wagon sedan hatchback sedan hatchback sedan sedan wagon sedan wagon sedan sedan sedan sedan sedan sedan sedan sedan sedan hatchback sedan hatchback sedan sedan sedan sedan sedan wagon sedan hatchback wagon hardtop hatchback sedan sedan 0 0 0 0 -1 -1 3 3 3 1 3 2 -2 -1 1 1 1 1 1 1 1 3 -1 -1 2 0 0 3 3 3 3 3 3 0 3 1 1 0 0 0 0 2 1 Neutral Neutral Neutral Neutral Safe Safe Risky Risky Risky Risky Risky Risky Safe Safe Risky Risky Risky Risky Risky Risky Risky Risky Safe Safe Risky Neutral Neutral Risky Risky Risky Risky Risky Risky Neutral Risky Risky Risky Neutral Neutral Neutral Neutral Risky Risky subaru nissan nissan nissan toyota toyota toyota toyota nissan nissan nissan chevrolet volvo volvo mazda mazda mazda mazda mitsubishi mazda mitsubishi mitsubishi dodge plymouth isuzu peugot peugot mitsubishi plymouth dodge alfa-romero mitsubishi mitsubishi peugot alfa-romero alfa-romero mercury peugot peugot mazda jaguar subaru toyota gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas std std std std std std std std std std turbo std turbo turbo std std std std std std std std std std std std std turbo turbo turbo std turbo turbo std std std turbo std std std std std std four four four four four four two two two two two two four four two two four two four four four two four four two four four two two two two two two four two two two four four four two two two wagon sedan sedan wagon sedan wagon hatchback hatchback hatchback hatchback hatchback hatchback sedan wagon hatchback hatchback sedan hatchback sedan sedan sedan hatchback wagon wagon hatchback sedan wagon hatchback hatchback hatchback convertible hatchback hatchback sedan convertible hatchback hatchback sedan wagon sedan sedan hatchback hatchback 1 2 1 0 0 0 1 0 0 0 0 2 0 2 0 1 1 0 2 0 0 1 0 0 2 2 0 1 2 0 0 2 0 2 -1 0 -1 3 0 0 0 0 2 Risky Risky Risky Neutral Neutral Neutral Risky Neutral Neutral Neutral Neutral Risky Neutral Risky Neutral Risky Risky Neutral Risky Neutral Neutral Risky Neutral Neutral Risky Risky Neutral Risky Risky Neutral Neutral Risky Neutral Risky Safe Neutral Safe Risky Neutral Neutral Neutral Neutral Risky toyota honda toyota isuzu toyota toyota nissan subaru toyota subaru toyota volkswagen toyota volkswagen subaru toyota toyota toyota toyota mazda toyota mazda subaru toyota toyota toyota mazda mazda toyota mazda subaru toyota subaru toyota volvo jaguar mercedes-benz mercedes-benz jaguar mazda toyota toyota volkswagen gas gas gas gas gas gas diesel gas gas gas gas diesel gas diesel gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas gas diesel gas gas gas gas diesel diesel diesel diesel std std std std std std std std std std std std std std std std std std std std std std std std std std std std std std turbo std turbo std turbo std std std std std std std turbo two two four four four four two four four four four two four four four two two four two four four two four four two two four two two four four two four two four four four two four four four four four hatchback hatchback hatchback sedan wagon sedan sedan sedan hatchback wagon sedan sedan wagon sedan wagon sedan hatchback hatchback hardtop sedan wagon hatchback sedan sedan hardtop hatchback sedan hatchback hardtop hatchback sedan hatchback wagon convertible sedan sedan sedan convertible sedan sedan hatchback sedan sedan -1 0 0 1 2 2 0 -1 0 -1 -1 0 0 1 -1 -1 -1 -1 0 0 0 0 0 0 Safe Neutral Neutral Risky Risky Risky Neutral Safe Neutral Safe Safe Neutral Neutral Risky Safe Safe Safe Safe Neutral Neutral Neutral Neutral Neutral Neutral toyota volkswagen mercedes-benz mercedes-benz subaru subaru subaru mercedes-benz mercedes-benz mercedes-benz mercedes-benz bmw bmw bmw toyota toyota toyota toyota mazda peugot peugot peugot peugot peugot diesel diesel gas gas gas gas gas diesel diesel diesel diesel gas gas gas gas gas gas gas diesel diesel diesel diesel diesel diesel turbo turbo std std std std std turbo turbo turbo turbo std std std std std std std std turbo turbo turbo turbo turbo four four four two two two four four two four four two four four four four four four four four four four four four sedan sedan sedan hardtop hatchback hatchback sedan sedan hardtop wagon sedan sedan sedan sedan sedan hatchback sedan hatchback sedan sedan wagon sedan wagon sedan drive wheels rwd rwd fwd fwd fwd fwd fwd rwd rwd rwd fwd fwd fwd fwd fwd rwd rwd rwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd engine location wheele base length width height curb weight front 94.5 168.7 64 52.6 2265 front 94.5 168.7 64 52.6 2300 front 93.7 150 64 52.6 1940 front 86.6 144.6 63.9 50.8 1819 front 93.7 150 64 52.6 1956 front 96.5 163.4 64 54.5 2010 front 96.5 157.1 63.9 58.3 2024 rear 89.5 168.9 65 51.6 2756 rear 89.5 168.9 65 51.6 2756 rear 89.5 168.9 65 51.6 2800 front 96.5 167.5 65.2 53.3 2236 front 96.5 175.4 65.2 54.1 2304 front 96.5 167.5 65.2 53.3 2289 front 96.5 175.4 62.5 54.1 2372 front 96.5 175.4 65.2 54.1 2465 front 101.2 176.8 64.8 54.3 2395 front 101.2 176.8 64.8 54.3 2395 front 108 186.7 68.3 56 3130 front 93.7 157.3 64.4 50.8 1918 front 93.7 150 64 52.6 1837 front 93.7 157.3 63.8 50.8 1876 front 93.7 157.3 63.8 50.8 1918 front 93.7 157.3 64.4 50.8 1944 front 93.7 157.3 63.8 50.6 1967 front 93.7 157.3 63.8 50.6 1967 front 93.7 157.3 63.8 50.8 1876 front 93.7 157.3 64.4 50.8 2004 front 93.7 157.3 63.8 50.6 1989 front 93.7 167.3 63.8 50.8 1989 front 93.7 157.3 63.8 50.6 1989 front 93.7 167.3 63.8 50.8 2191 front 93 157.3 63.8 50.8 2145 front 93.7 157.3 63.8 50.8 2128 front 93.7 157.3 63.8 50.8 2128 front 93.7 157.3 63.8 50.6 2191 front 96.3 172.4 65.4 51.6 2403 front 96.3 172.4 65.4 51.6 2403 front 96.3 173 65.4 49.4 2370 front 94.5 165.7 64 51.4 2221 front 97.3 171.7 65.5 55.7 2300 front 96.5 169.1 66 51 2293 front 94.5 159.3 64.2 55.6 2254 engine type dohc dohc ohc ohc ohc ohc ohc ohcf ohcf ohcf ohc ohc ohc ohc ohc ohc ohc l ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc fwd fwd fwd fwd 4wd fwd fwd fwd fwd rwd rwd fwd fwd fwd rwd rwd rwd rwd rwd rwd rwd rwd rwd rwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front 100.4 100.4 99.8 99.8 99.4 105.8 99.1 99.1 105.8 109.1 94.5 105.8 94.5 94.5 104.3 104.3 104.3 104.3 109.1 109.1 103.5 110 103.5 109.1 97.3 97.3 97.3 99.1 99.1 99.1 99.1 94.5 94.5 94.5 94.5 94.5 94.5 94.5 94.5 95.1 97.2 97.2 97.2 183.1 180.2 176.6 177.3 176.6 192.7 186.6 186.6 192.7 188.8 168.9 192.7 155.9 158.8 188.8 188.8 188.8 188.8 188.8 188.8 189 197 193.8 188.8 171.7 171.7 171.7 186.6 186.6 186.6 186.6 165.3 165.3 165.3 165.3 170.2 165.3 165.6 170.2 162.4 173.4 173.4 172 66.9 66.9 66.2 66.3 66.4 71.4 66.5 66.5 71.4 68.9 68.3 71.4 63.6 63.6 67.2 67.2 67.2 67.2 68.9 68.9 66.9 70.9 67.9 68.8 65.5 65.5 65.5 66.5 66.5 66.5 66.5 63.8 63.8 63.8 63.8 63.8 63.8 63.8 63.8 63.8 65.2 65.2 65.4 55.1 55.1 54.3 53.1 54.3 55.7 56.1 56.1 55.7 55.5 50.2 55.9 52 52 56.2 57.5 56.2 57.5 55.5 55.5 55.7 56.3 53.7 55.5 55.7 55.7 55.7 56.1 56.1 56.1 56.1 54.5 54.5 54.5 54.5 53.5 54.5 53.3 53.5 53.3 54.7 54.7 52.5 2563 2661 2337 2507 2824 2844 2808 2847 2954 3012 2778 3086 1874 1909 2912 3034 2935 3042 2952 3062 3230 3505 3380 3049 2209 2212 2275 2658 2695 2707 2758 1889 1918 1938 1951 2024 1971 2028 2037 2008 2324 2302 2340 ohc ohc ohc ohc ohc ohc dohc dohc ohc ohcv ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohcf fwd fwd fwd fwd rwd rwd rwd rwd rwd rwd rwd fwd rwd rwd fwd fwd fwd fwd fwd fwd fwd fwd fwd fwd rwd rwd rwd fwd rwd fwd rwd fwd fwd rwd rwd rwd rwd rwd rwd rwd rwd fwd fwd front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front 97 100.4 100.4 100.4 104.5 104.5 102.9 102.9 91.3 99.2 91.3 88.4 104.3 104.3 93.1 93.1 93.1 93.1 96.3 93.1 96.3 96.3 103.3 103.3 96 107.9 114.2 95.9 95.9 95.9 88.6 95.9 95.9 107.9 88.6 94.5 102.7 107.9 114.2 104.9 102 93.7 95.7 173.5 181.7 184.6 184.6 187.8 187.8 183.5 183.5 170.7 178.5 170.7 141.1 188.8 188.8 159.1 159.1 166.8 159.1 172.4 166.8 172.4 173 174.6 174.6 172.6 186.7 198.9 173.2 173.2 173.2 168.8 173.2 173.2 186.7 168.8 171.2 178.4 186.7 198.9 175 191.7 156.9 158.7 65.4 66.5 66.5 66.5 66.5 66.5 67.7 67.7 67.9 67.9 67.9 60.3 67.2 67.2 64.2 64.2 64.2 64.2 65.4 64.2 65.4 65.4 64.6 64.6 65.2 68.4 68.4 66.3 66.3 66.3 64.1 66.3 66.3 68.4 64.1 65.5 68 68.4 68.4 66.1 70.6 63.4 63.6 53 55.1 55.1 56.1 54.1 54.1 52 52 49.7 49.7 49.7 53.2 56.2 57.5 54.1 54.1 54.1 54.1 51.6 54.1 51.6 49.4 59.8 59.8 51.4 56.7 58.7 50.2 50.2 50.2 48.8 50.2 50.2 56.7 48.8 52.4 54.8 56.7 56.7 54.4 47.8 53.7 54.5 2455 3095 3060 3296 3131 3151 3016 2976 3071 3139 3139 1488 3045 3157 1890 1900 1945 1905 2365 1950 2405 2328 2535 2535 2734 3020 3230 2833 2818 2811 2548 2926 2921 3075 2548 2823 2910 3075 3285 2670 3950 2050 1985 ohcf ohcv ohcv ohcv dohc dohc dohc dohc ohcv ohcv ohcv l ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc l l ohc ohc ohc dohc ohc ohc l dohc ohcv ohc l l ohc ohcv ohcf ohc fwd fwd fwd rwd fwd fwd fwd fwd fwd fwd fwd fwd 4wd fwd 4wd rwd rwd fwd rwd fwd 4wd fwd 4wd fwd rwd rwd fwd fwd rwd fwd 4wd rwd 4wd rwd rwd rwd rwd rwd rwd fwd fwd fwd fwd front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front front 95.7 86.6 95.7 94.3 95.7 95.7 94.5 97.2 95.7 97 95.7 97.3 95.7 97.3 96.9 94.5 94.5 95.7 98.4 98.8 95.7 98.8 97 95.7 98.4 98.4 98.8 98.8 98.4 98.8 97 98.4 96.9 98.4 109.1 113 115.6 96.6 113 98.8 95.7 95.7 97.3 158.7 144.6 158.7 170.7 169.7 166.3 165.3 172 166.3 173.5 166.3 171.7 169.7 171.7 173.6 168.7 168.7 166.3 176.2 177.8 169.7 177.8 172 166.3 176.2 176.2 177.8 177.8 176.2 177.8 172 176.2 173.6 176.2 188.8 199.6 202.6 180.3 199.6 177.8 166.3 166.3 171.7 63.6 63.9 63.6 61.8 63.6 64.4 63.8 65.4 64.4 65.4 64.4 65.5 63.6 65.5 65.4 64 64 64.4 65.6 66.5 63.6 66.5 65.4 64.4 65.6 65.6 66.5 66.5 65.6 66.5 65.4 65.6 65.4 65.6 68.9 69.6 71.7 70.5 69.6 66.5 64.4 64.4 65.5 54.5 50.8 54.5 53.5 59.1 53 54.5 52.5 52.8 53 53 55.7 59.1 55.7 54.9 52.6 52.6 52.8 52 55.5 59.1 53.7 54.3 52.8 52 52 55.5 53.7 52 55.5 54.3 52 54.9 53 55.5 52.8 56.5 50.8 52.8 55.5 52.8 53 55.7 2040 1713 2015 2337 2280 2081 2017 2145 2109 2290 2094 2261 2290 2264 2420 2169 2204 2122 2540 2410 3110 2385 2385 2140 2536 2551 2410 2385 2679 2425 2510 2714 2650 2975 3217 4066 3740 3685 4066 2443 2275 2275 2319 ohc ohc ohc ohc ohc ohc ohc ohcf ohc ohcf ohc ohc ohc ohc ohcf ohc ohc ohc ohc ohc ohc ohc ohcf ohc ohc ohc ohc ohc ohc ohc ohcf ohc ohcf ohc ohc dohc ohcv ohcv dohc ohc ohc ohc ohc fwd fwd rwd rwd fwd 4wd fwd rwd rwd rwd rwd rwd rwd rwd fwd fwd fwd fwd rwd rwd rwd rwd rwd rwd front front front front front front front front front front front front front front front front front front front front front front front front 102.4 100.4 120.9 112 93.7 93.3 97.2 110 106.7 110 115.6 101.2 101.2 103.5 102.4 102.4 102.4 102.4 104.9 107.9 114.2 107.9 114.2 107.9 175.6 180.2 208.1 199.2 157.9 157.3 172 190.9 187.5 190.9 202.6 176.8 176.8 189 175.6 175.6 175.6 175.6 175 186.7 198.9 186.7 198.9 186.7 66.5 66.9 71.7 72 63.6 63.8 65.4 70.3 70.3 70.3 71.7 64.8 64.8 66.9 66.5 66.5 66.5 66.5 66.1 68.4 68.4 68.4 68.4 68.4 54.9 55.1 56.7 55.4 53.7 55.7 52.5 56.5 54.9 58.7 56.3 54.3 54.3 55.7 54.9 53.9 54.9 53.9 54.4 56.7 58.7 56.7 58.7 56.7 2480 2579 3900 3715 2120 2240 2190 3515 3495 3750 3770 2710 2765 3055 2326 2414 2414 2458 2700 3197 3430 3252 3485 3252 ohc ohc ohcv ohcv ohcf ohcf ohcf ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc ohc l l l l l no of cylinders engine size fuel system bore stroke compression ratio HP peak RPM city mpg four 98 mpfi 3.24 3.08 9.4 112 6600 26 four 98 mpfi 3.24 3.08 9.4 112 6600 26 four 92 1bbl 2.91 3.41 9.2 76 6000 30 four 92 1bbl 2.91 3.41 9.2 76 6000 31 four 92 1bbl 2.91 3.41 9.2 76 6000 30 four 92 1bbl 2.91 3.41 9.2 76 6000 30 four 92 1bbl 2.92 3.41 9.2 76 6000 30 six 194 mpfi 3.74 2.9 9.5 207 5900 17 six 194 mpfi 3.74 2.9 9.5 207 5900 17 six 194 mpfi 3.74 2.9 9.5 207 5900 17 four 110 1bbl 3.15 3.58 9 86 5800 27 four 110 1bbl 3.15 3.58 9 86 5800 27 four 110 1bbl 3.15 3.58 9 86 5800 27 four 110 1bbl 3.15 3.58 9 86 5800 27 four 110 mpfi 3.15 3.58 9 101 5800 24 four 108 mpfi 3.5 2.8 8.8 101 5800 23 four 108 mpfi 3.5 2.8 8.8 101 5800 23 four 134 mpfi 3.61 3.21 7 142 5600 18 four 92 2bbl 2.97 3.23 9.4 68 5500 37 four 79 1bbl 2.91 3.07 10.1 60 5500 38 four 90 2bbl 2.97 3.23 9.41 68 5500 37 four 90 2bbl 2.97 3.23 9.4 68 5500 37 four 92 2bbl 2.97 3.23 9.4 68 5500 31 four 90 2bbl 2.97 3.23 9.4 68 5500 31 four 90 2bbl 2.97 3.23 9.4 68 5500 31 four 90 2bbl 2.97 3.23 9.4 68 5500 31 four 92 2bbl 2.97 3.23 9.4 68 5500 31 four 90 2bbl 2.97 3.23 9.4 68 5500 31 four 90 2bbl 2.97 3.23 9.4 68 5500 31 four 90 2bbl 2.97 3.23 9.4 68 5500 31 four 98 2bbl 2.97 3.23 9.4 68 5500 31 four 98 spdi 3.03 3.39 7.6 102 5500 24 four 98 mpfi 3.03 3.39 7.6 102 5500 24 four 98 spdi 3.03 3.39 7.6 102 5500 24 four 98 mpfi 3.03 3.39 7.6 102 5500 24 four 110 spdi 3.17 3.46 7.5 116 5500 23 four 110 spdi 3.17 3.46 7.5 116 5500 23 four 110 spdi 3.17 3.46 7.5 116 5500 23 four 109 mpfi 3.19 3.4 8.5 90 5500 24 four 109 mpfi 3.19 3.4 10 100 5500 26 four 110 2bbl 3.15 3.58 9.1 100 5500 25 four 109 mpfi 3.19 3.4 8.5 90 5500 24 four five four five five five four four five six four five four four four four four four four four six six six four four four four four four four four four four four four four four four four four four four four 109 136 109 136 136 136 121 121 136 173 151 131 90 90 141 141 141 141 141 141 209 209 209 141 109 109 109 121 121 121 121 97 97 97 97 97 97 97 97 97 120 120 108 mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi 2bbl 2bbl mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl mpfi 3.19 3.19 3.19 3.19 3.19 3.19 3.54 3.54 3.19 3.58 3.94 3.13 3.03 3.03 3.78 3.78 3.78 3.78 3.78 3.78 3.62 3.62 3.62 3.78 3.19 3.19 3.19 3.54 3.54 2.54 3.54 3.15 3.15 3.15 3.15 3.15 3.15 3.15 3.15 3.15 3.33 3.33 3.62 3.4 3.4 3.4 3.4 3.4 3.4 3.07 3.07 3.4 2.87 3.11 3.4 3.11 3.11 3.15 3.15 3.15 3.15 3.15 3.15 3.39 3.39 3.39 3.15 3.4 3.4 3.4 3.07 3.07 2.07 3.07 3.29 3.29 3.29 3.29 3.29 3.29 3.29 3.29 3.29 3.47 3.47 2.64 9 8.5 10 8.5 8 8.5 9 9 8.5 8.8 9.5 8.3 9.6 9.6 9.5 9.5 9.5 9.5 9.5 9.5 8 8 8 8.7 9 9 9 9.31 9.3 9.3 9.3 9.4 9.4 9.4 9.4 9.4 9.4 9.4 9.4 9.4 8.5 8.5 9 88 110 102 110 115 110 160 160 110 134 143 140 70 70 114 114 114 114 114 114 182 182 182 160 85 85 85 110 110 110 110 69 69 69 69 69 69 69 69 69 97 97 94 5500 5500 5500 5500 5500 5500 5500 5500 5500 5500 5500 5500 5400 5400 5400 5400 5400 5400 5400 5400 5400 5400 5400 5300 5250 5250 5250 5250 5250 5250 5250 5200 5200 5200 5200 5200 5200 5200 5200 5200 5200 5200 5200 25 19 24 19 18 19 19 19 19 18 19 17 38 38 23 23 24 24 23 19 16 15 16 19 27 27 27 21 21 21 21 31 31 31 31 31 31 31 31 31 27 27 26 four six six six six six six six six six six three four four four four four four four four four four four four four four four four four four four four four four four six four four four four twelve four four 108 181 181 181 171 161 171 171 181 181 181 61 130 130 91 91 91 91 122 91 122 122 122 122 119 120 120 156 156 156 130 156 156 120 130 152 140 120 120 140 326 97 92 mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi mpfi 2bbl mpfi mpfi 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl 2bbl spfi mpfi 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Explanation & Answer

Attached.

95% confidence interval of the proportion of cars that have four doors
Data
Sample Size
Number of Successes
Confidence Level

195
113
95%

Intermediate Calculations
Sample Proportion
0.57948718
Z Value
-1.9600
Standard Error of the Proportion
0.0354
Interval Half Width
0.0693
Confidence Interval
Interval Lower Limit
Interval Upper Limit

0.5102
0.6488

The above comput...