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A researcher wants to know if people who subscribe to Netflix are happier than people in the general population. Assume happiness in the population is

A researcher wants to know if people who subscribe to Netflix are happier than people in the general population. Assume happiness in the population is normally distributed with a mean of 50 and a standard deviation of 20. The researcher collects a sample of 10 Netflix subscribers and finds a mean happiness score of 58. Calculate the standard error

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