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Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 6 - Problem 8
Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 6 - Problem 8

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ISBN: 9780134133539 240

## Solution for problem 8 Chapter 6

Statistics: Informed Decisions Using Data | 5th Edition

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Problem 8

Suppose the adult American population is equally split in their belief that the amount of tax (federal, state, property, sales, and so on) they pay is too high.

(a) How many people would we expect to say they pay too much tax if we surveyed 1200 randomly selected adult Americans?

(b) Explain why we can use the Empirical Rule with the idea of unusual events (events that occur with relative frequency less than 0.05) to identify any unusual results in a survey of 1200 adult Americans.

(c) If a survey of 1200 adult Americans results in 640 stating they feel the amount of tax they pay is too high, would these results contradict the belief that adult Americans are equally split in their belief that the amount of tax they pay is too high? Why?

Step-by-Step Solution:

Step 1 of 5) Suppose the adult American population is equally split in their belief that the amount of tax (federal, state, property, sales, and so on) they pay is too high. (a) How many people would we expect to say they pay too much tax if we surveyed 1200 randomly selected adult Americans (b) Explain why we can use the Empirical Rule with the idea of unusual events (events that occur with relative frequency less than 0.05) to identify any unusual results in a survey of 1200 adult Americans. (c) If a survey of 1200 adult Americans results in 640 stating they feel the amount of tax they pay is too high, would these results contradict the belief that adult Americans are equally split in their belief that the amount of tax they pay is too high Why Determine the Appropriate Hypothesis Test to Perform Again, the ability to recognize the type of test to perform is one of the most important aspects of statistical analysis. To help decide which test to use when conducting inference on two samples, we provide the flow chart in Figure 24 on the next page. Use it to assist you in the problems that follow.

Step 2 of 2

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