# pre algebra part 2

User Generated

wzuf

Mathematics

## Description

Question 1 (5 points)

## Prices for the salad bar at some local restaurants are \$8.95, \$6.50, \$12.25, \$9.90, \$11.00, \$8.95, \$10.75, and \$6.50. Find the mean, median, and mode.

Question 1 options:

\$9.35, \$9.43, \$6.50 and \$8.95

\$9.35, \$10.45, no mode

\$9.89, \$9.43, \$8.95

\$9.89, \$10.45, \$6.50, and \$8.95

Question 2 (5 points)

The spinner shown at right is spun once. Determine the probability of each outcome. Express each probability as a fraction and as a percent. Then describe the likelihood of the event. Write impossible, unlikely, equally likely, likely, or certain.

P(odd)Question 2 options:

; likely

; equally likely

; impossible

; certain

Question 3 (5 points)

Identify the sample as biased or unbiased and describe its type.

Tia surveyed every third house in the locality to determine the number of people who own pets.Question 3 options:

unbiased, simple random sample

biased, voluntary response sample

unbiased, systematic random sample

biased, convenience sample

Question 4 (5 points)

Find the median of the following set of data. Round to the nearest tenth if necessary.

26.1, 8.4, 11.4, 44.1, 32.3, 46, 41, 18.5, 20, 9.3, 19.6Question 4 options:

32.3

20

26.1

25.2

Question 5 (5 points)

Before starting a summer jobs program, the school board conducted a survey at various schools. They interviewed 30% of the high school students to know whether they would participate in the program. The results are shown in the graph.

Is this sampling method valid? If so, how many of 750 students of various high schools are likely to participate in this program?

Question 5 options:

no, 125

yes, 125

no, 625

## yes, 625

Question 6 (5 points)

A number cube is tossed and the spinner below is spun. Find P(3 and C).

Question 6 options:

Question 7 (5 points)

Matthew has 8 dimes and 10 quarters in a box. Find the probability of drawing a dime.

Question 7 options:

Question 8 (5 points)

In baseball, Shintaro had 4 hits in his last 12 times at bat.

If Shintaro has 36 at bats in the next week, about how many hits will he have?Question 8 options:

24

12

10

9

Question 9 (5 points)

Find the mean of each set of data. Round to the nearest tenth if necessary.

14, 39, 27, 17, 17, 25, 10, 37Question 9 options:

23.3

21.3

24.8

21

Question 10 (5 points)

The table shows the number of campsite reservations at two different state parks over the past 10 weekends.

Number of Campsite Reservations

East Fork

32

36

39

39

43

45

50

51

56

## 80

Blue Ridge

38

40

45

47

51

52

60

62

69

73

Are there any outliers in the data for either state park? Question 10 options:

The data points 56 and 80 reservations are outliers for East Fork.

The data point 38 reservations is an outlier for Blue Ridge.

The data point 80 reservations is an outlier for East Fork.

There are no outliers.

Question 11 (5 points)

Find the range for the set of data.

101, 72, 115, 114, 117, 56, 101, 68, 111, 58, 51, 51, 90Question 11 options:

64

85

66

90

Question 12 (5 points)

Find the probability.

A marble is randomly selected from a bag containing 15 black, 12 white, and 6 clear marbles. Find P(not clear). Round to the nearest percent if necessary.
Question 12 options:

18%

82%

64%

55%

Question 13 (5 points)

Find the median, first quartile, third quartile, interquartile range, and any outliers for each set of data.

14.6, 28.1, 3.9, 7.1, 5.3, 30.9, 2.8, 6.5, 20.8, 16.4, 16.4, 27.1, 53.5, 12.5, 6.1 Question 13 options:

median: 14.6, Q1: 6.1, Q3: 27.1, IR: 21, outliers: none

## median: 14.6, Q1: 6.1, Q3: 27.1, IR: 20, outliers: none

median: 14.6, Q1: 6.1, Q3: 27.1, IR: 21, outliers: 2.8

median: 14.6, Q1: 6.1, Q3: 25.1, IR: 21, outliers: none

Question 14 (5 points)

Nina’s quiz scores for the quarter are 90, 79, 5, 84, 95, 81, 87, and 94. Which measure of central tendency best represents the data shown in the table and why?

Question 14 options:

Since the data have many repeated values, the mode best represents the data.

Since there is an extreme value (5) and there are no big gaps in the middle of the data, the median best represents the data.

Since there are no extreme values, the mean best represents the data.

Since there are no extreme values and few repeated numbers, the median best represents the data.

Question 15 (5 points)

The frequency table shows Sam’s record in swimming.

Year

Number of medals

2008

6

2009

4

2010

1

2012

7

2013

4

Based on this record, what is the probability of picking up a medal won by him in the years 2009 or 2012.

Question 15 options:

2

Question 16 (5 points)

Lionel is apartment hunting. He makes a table of prospective apartment choices.

Apartment Rental PricesApartment ChoicePrice per Month (\$)1630275536754765569066807675

Which measure of central tendency best represents the data shown in the table and why?

Question 16 options:

## Since the data is grouped close together, the mode best represents the data.

Since there are no extreme values, the median best represents the data.

Since there are no extreme values and few repeated numbers, the mean best represents the data.

Since the value 675 occurs more than once, the mode best represents the data.

Question 17 (5 points)

The table shows the number of points scored by each team in a tournament.

Number of Points Scored

12

25

16

20

31

16

19

22

Find the mean absolute deviation of the number of points scored. Round to the nearest hundredth if necessary.

Question 17 options:

4.41

16

20.13

35.26

Question 18 (5 points)

Find the mode of each set of data.

33, 19, 15, 39, 39, 34, 24, 29Question 18 options:

31

29

32

39

Question 19 (5 points)

Find the probability.

A bag of sweets contains 20 gummy bears and 35 orange slices. One sweet is taken at random from the bag. Find P(gummy bear).Question 19 options:

Question 20 (5 points)

Find the median, first quartile, third quartile, interquartile range, and any outliers for each set of data.

## 111, 68, 93, 88, 74, 152, 119, 87, 88, 105, 84, 102, 151, 115, 112 Question 20 options:

median: 102, Q1: 87, Q3: 113, IR: 28, outliers: none

median: 102, Q1: 87, Q3: 115, IR: 28, outliers: 68

median: 102, Q1: 87, Q2: 115, IR: 28, outliers: none

median: 102, Q1: 87, Q3: 115, IR: 27, outliers: none

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