Internet Viewing A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be 90% confident that the population mean is within 13 minutes of the sample mean? Assume the population standard deviation is 47 minutes. Round your final answer up to the next whole number.   The researcher needs a sample of at least    people.

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately = 60.5. You would like to be 95% confident that your estimate is within 5 of the true population mean. How large of a sample size is required? Round up to nearest whole number. n= Question Help: Video Written Example Message instructor Submit Question Jump to Answer 80 F1 F2 F3 Q A N @ 2 W S #3 X E D $ F4 R or dº % 5 F5 T MacBook Air F6 6 Y & 7 A4 F7 U * 00 8 J DII F8 | ( 9 K F9 0 ) о

Internet Viewing A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be 95% confident that the population mean is within 7 minutes of the sample mean? Assume the population standard deviation is 36 minutes. Round your final answer up to the next whole number. The researcher needs a sample of at least people. ol

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Find the Mean, Median and Standard Deviation for the data. Round to two decimal places. 10,7,9,3,8,15,5,5,12

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Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95​% confidence that your error is no more than 0.03.

You are asked to find some descriptive statistics for the heartrate data. Use the methods in the practice activity as a guide to help you find the mean, median, and standard deviation for the heartrate data. Mean: 74.1 Median: 74 Standard Deviation: 6.5 Which measure of central tendency is the most appropriate for the heartrate data?