Mathematics, 18.07.2021 01:30, alananicoleee

PLEASE HELP! I don't know how to find the sample mean in this example because there is no data set. A random sample of 45 Hollywood movies made since 2010 is 130.5 minutes with a sample standard deviation of 13.8 minutes. Construct a 95% confidence interval for the true population mean length of all Hollywood movies since 2010.

what is the sample mean?

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PLEASE HELP! I don't know how to find the sample mean in this example because there is no data set....