Question: b) 2.49 1.60 d) ) 2.58 991 4. A study of 40 math teachers showed they spent an average 15 minutes correcting a student's homework.


b) 2.49 1.60 d) ) 2.58 991 4. A study of 40 math teachers showed they spent an average 15 minutes correcting a student's homework. Find the 95% confidence interval of the mean if o = 1.5 min. a) (14.32, 15.68) c) (14, 16) b) (14.54, 15.46) d) (13, 17) 5. Calculate the 93% confidence interval for population mean if the sample mean = 93, o = 13
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