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Chapter 8: Q. 1 (page 506)

How many pairs of shoes, on average, do female teens have? To find out, an AP Statistics class selected an SRS of 20female students from their school. Then they recorded the number of pairs of shoes that each student reported having. Here are the data:

Short Answer

Expert verified

The solution isx炉=30.35

Step by step solution

01

Step 1. Given information

Here are the data:

02

Step 2. Calculation

Formula used:

x炉=鈭�xn

x炉=50+26+26+31+57+19+24+22+23+38+13+50+13+34+23+30+49+13+15+5120=60720=30.35

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Most popular questions from this chapter

In preparing to construct a one-sample t interval for a population mean, suppose we are not sure if the population distribution is Normal. In which of the following circumstances would we not be safe constructing the interval based on an SRS of size14from the population?

a. A stemplot of the data is roughly bell-shaped.

b. A histogram of the data shows slight skewness.

c. A boxplot shows that the values above the median are much more variable than the values below the median.

d. The sample standard deviation is large.

e. The sample standard deviation is small.

It鈥檚 about ME Explain how each of the following would affect the margin of error of a confidence interval, if all other things remained the same.

a. Increasing the confidence level

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a. Define the parameter p in this setting.

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d. If the procedure were repeated many times, 95%of the time the population mean systolic blood pressure would be between 122and 138.

e. If the procedure were repeated many times, 95%of the time the sample mean systolic blood pressure would be between 122and138.

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