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QUESTION
Construct a 90% confidence interval estimate for the population average time spent on preparation. Interpret the interval 10.
9. Construct a 90% confidence interval estimate for the population average time spent on preparation. Interpret the interval
10. Test the hypothesis that population average time spent on preparation is more than 65 hours using a 5% level of significance
Should i use the t test or z test to calculate these 2? i know all the means, standard variation, etc, correlation
