Find the mean first = sum of scores/number of scores
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
Standard deviation = square root of variance
95% = mean ± 1.96 SEm
SEm = SD/√n
I'll let you do the calculations.
twelve different vTideo games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the sample data to construct a 95% confidence interval estimate of u (mew) ((population mean)) the mean duration of game play. 4054 3874 3862 4034 4327 4807 4654 4025 5000 4832 4340 4309 What is the confidence interval estimate of the population mean u? ____ Round to one decimal place as needed.
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