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A random sample of 22 people shows the sample mean time people spend online shopping is 8 hours a month with a standard deviation of

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A random sample of 22 people shows the sample mean time people spend online shopping is 8 hours a month with a standard deviation of 2.2. Assume that the population data follows normal distribution. How many degrees of freedom we use to find the t-critical statistic value? [ Select ] What is Maximal Margin of Error (E) at 95% confidence? [ Select ] Construct a 95% confidence interval. [ Select ] V

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