Government data show that 8% of the American population are at leasttutor4helpyou
Government data show that 8% of the American population are at least 75 years of age. To test a random-digit dialing device, you use the device to call randomly chosen residential telephones in your county. Of the 260 members of the households contacted, 6% are 75 years or older.
(a) Is each of the boldface numbers a parameter or a statistic?
(b) Assume that your county's population is similar to the American population in age distribution. What are the mean and standard deviation of the sample proportion p-hat who are at least 75 years of age in samples of 260 respondents?
μp-hat= (Round to 2 decimal places)
σp-hat= (Round to 3 decimal places)
- 7 years ago
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