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Chapter 1: Q. 69 (page 48)
Here are the amounts of money (cents) in coins carried by 10 students in a statistics class: To make a stemplot of these data, you would use stems
(a)
(b)
(c)
(d)
(e) None of these.
The answer is
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Here are the scores on the Survey of Study Habits and Attitudes (SSHA) for 18 first-year college women:
and for 20 first-year college men:
Do these data support the belief that women have better study habits and attitudes toward learning than men? (Note that high scores indicate good study habits and attitudes toward learning.) Follow the four-step process.
The audience for movies Here are data on the percent of people in several age groups who attended a movie in the past months:
(a) Display these data in a bar graph. Describe what you see.
(b) Would it be correct to make a pie chart of these data? Why or why not?
(c) A movie studio wants to know what percent of the total audience for movies is to years old. Explain why these data do not answer this question.
| Age group | Movie attendence |
| 18 to 24 years | 83% |
| 25 to 34 years | 73% |
| 35 to 44 years | 68% |
| 45 to 54 years | 60% |
| 55 to 64 years | 47% |
| 65 to 74 years | 32% |
| 75 to and over | 20% |
Attitudes toward recycled products Exercise gives data on the opinions of people who have and have not bought coffee filters made from recycled paper.
To see the relationship between opinion and experience with the product, find the conditional distributions of opinion (the response variable) for buyers and nonbuyers. What do you conclude?
This is a standard deviation contest. You must choose four numbers from the whole numbers to , with repeats allowed.
(a) Choose four numbers that have the smallest possible standard deviation.
(b) Choose four numbers that have the largest possible standard deviation.
(c) Is more than one choice possible in either (a) or (b)? Explain.
Going to school Students in a high school statistics class were given data about the primary method of transportation to school for a group of students. They produced the pictograph shown.
(a) How is this graph misleading?
(b) Make a new graph that isn’t misleading.
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