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Chapter 8: Q 11. (page 507)
More prayer in school Refer to Exercise . Interpret the confidence level.
All samples to have confidence interval have population parameter.
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How confident? The figure shows the result of taking SRSs from a Normal population and constructing a confidence interval for the population mean using each sample. Which confidence level鈥�鈥攄o you think was used? Explain your reasoning.
Check them all Determine if the conditions are met for constructing a confidence interval for the population mean in each of the following settings.
a. How much time do students at your school spend on the Internet? You collect data from the members of your AP Statistics class and calculate the mean amount of time that these students spent on the Internet yesterday.
b. Is the real-estate market heating up? To estimate the mean sales price, a realtor in a large city randomly selected home sales from the previous months in her city. These sales prices are displayed in the boxplot.
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
b. Quadrupling the sample size
Prom totals Use your interval from Exercise 39 to construct and interpret a
confidence interval for the total number of seniors planning to go to the prom.
Rating school food Latoya wants to estimate the proportion of the seniors
at her boarding school who like the cafeteria food. She interviews an SRS of of the seniors and finds that think the cafeteria food is good.
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