Question: Q.4. A random sample was selected from a population having a normal distribution. Calculate a 90% confidence interval estimate for for each of the

Q.4. A random sample was selected from a population having a

Q.4. A random sample was selected from a population having a normal distribution. Calculate a 90% confidence interval estimate for " for each of the following situations: (a). * = 134, n= 10,8 = 3.1 (b). E' = 3,744, n = 120,s= 8.2 (0). = 40.5, n=9,0 = 2.9

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