Biostats, homework help

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qramry009

Mathematics

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Biostats

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Work Sheet #1 Name(s): Solution Key 30 20 0 10 Frequency 40 Nutritional information for 77 types of breakfast cereal have been recorded (see DASL). The fiber contents per single serving of these cereals are displayed in the following histogram: 0 2 4 6 8 10 12 14 Fiber (gms) (Bar Heights: 48, 21, 5, 0, 2, 0, 1) 1. What is the shape of this distribution? Skewed towards larger values (right-skewed). 2. Are there any outliers? If so, how many? Yes, there are 3 outliers. 3. What proportion (ie, relative frequency) of cereals have 4 grams of fiber or less per serving? 69 77 = 0.896 4. The median is the value, in this case for fiber, such that half the observations are smaller than the median and half are larger. We cannot find the median exactly from the graph because the data are grouped. However, you can give two values that bracket the median. Pick the best answer: a) 0-2, b) 2-4, or c) 4-6. Since more than half the observations fall between 0 and 2 and they cannot be lower than 0, the median falls between 0 and 2. The answer is a).
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