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In order to approximate the number of text messages sent daily by Swedish teenagers, Neu Star...

In order to approximate the number of text messages sent daily by Swedish teenagers, Neu Star Communications took a random sample of Swedish youth, finding the number of text messages they sent on a given day in 2018: (use 2 digits after decimal point)

Hint: Σ X = 984 Σ X2 = 80784 n=12

Point Estimate for population mean is

Point estimate for population standard deviation is

Find 90% confidence interval for the population mean number of calls received by the help desk per day

Error margin (ME)

Lower bound and upper bound of the confidence interval is Answer

Math   Statistics-And-Probability   
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