Mathematics, 17.12.2020 21:00 jcastronakaya
A study of a local high school tried to determine the mean number of text messages that each student sent per day. The study surveyed a random sample of 81 students in the high school and found a mean of 163 messages sent per day with a standard deviation of 64 messages. At the 95% confidence level, find the margin of error for the mean, rounding to the nearest whole number.
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