Probability And Statistics Worksheets Page 40
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42Chapter 9 Assessment
1. A bowler got 32 strikes in her first 80 frames. What is the experimental
probability that she will not get a strike in her next frame?
2. Find the probability of drawing a red king or a 5 from a standard deck of
playing cards.
3. A pair of dice are rolled twice. Find P(sum is an even number, then sum is an
odd number).
4. There are 3 red T-shirts, 2 white T-shirts, 2 green T-shirts, and 1 blue T-shirt
in a drawer. You reach in without looking and take out two shirts. Find
P(red, green).
5. How many different two-flavor ice cream cones can be chosen from a menu
of 15 flavors?
6. Forty students are in the running for the science prize. In how many ways
can a winner, a runner-up, and an alternate be chosen?
Davis’ Stolen Bases
Use the scatter plot for Exercises 7
50
and 8.
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7. Does the scatter plot show a
negative or a positive correlation?
30
8. Estimate the number of stolen
20
bases Davis will have when he is
32 years old.
10
0
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Player’s Age
Groups of students and of community leaders rated the performance of the
school superintendent on a scale from 0 to 100. The box-and-whisker plots
below show the results.
Superintendent's Performance Rating
Students
Community
Leaders
0
10
20
30
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50
60
70
80
90
100
9. Which group gave the superintendent a higher median score?
10. For which group were the scores more widely spread?
11. Find the variance and standard deviation for the set of numbers:
10,
5, 0, 5, 10.
12. Patty scored 75 on a test in which the mean score in her class was 60 and the
standard deviation was 10. Jamaal took the same test in his class. His score
was 70, the class mean score was 50, and the standard deviation was 10. Who
scored better, relative to his or her classmates?
419
Chapter 9 Assessment
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