A researcher wanted to determine the mean number of hours per week (Sunday through Saturday) the typical person watches television. Results from the Sullivan Statistics Survey indicate that s = 6.5 hours. a) What is the minimum number of people the researcher must sample if they wish to estimate the mean number of hours to within 2 hours with 95% confidence? n= b) What is the minimum number of people the researcher must sample if they wish to estimate the mean number of hours to within half an hour with 95% confidence? n= c) What is the minimum number of people the researcher must sample if they wish to estimate the mean number of hours to within half an hour with 99% confidence? n=
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5 hours), and E is the margin of error (2 hours). From the z-table, we find that zĪ±/2 = 1.96. Substituting the values, we get: n = (1.96 * 6.5 / 2)^2 = 67.36 Rounding up to the nearest whole number, we get n = 68. Show moreā¦
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