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Mathematics, 12.02.2021 06:50 ruslffdr
Previous studies reported that teenagers spent 8.5 hours per week, on average, on the phone. This mean is supposed to have increased, to test this hypothesis, a random sample of 500 teenagers were interviewed about how many hours per week they spent on their phones. The sample mean was 10.5 hours with a sample standard deviation of 2.35. Conduct a hypothesis test. The null and alternative hypotheses are:
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Previous studies reported that teenagers spent 8.5 hours per week, on average, on the phone. This me...
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