Question

We studied a characteristic of iron. Under the normality assumption of its distribution
and using its sample mean and standard deviation, we computed the following confidence
interval [2271:7688; 2308:2312]. This interval is a confidence interval for the mean
of that characteristic at a level of confidence of 90%. We are told the sample size is 16
and the sample mean is x = 2290. What is the value of the sample standard deviation s?

We studied a characteristic of iron. Under the normality assumption of its distribution and using its sample mean and standard deviation, we computed the following confi- dence interval [2271.7688, 2308.2312]. This interval is a confidence interval for the mean of that characteristic at a level of confidence of 90%. We are told the the sample size is 16 and the sample mean is = 2290. What is the value of the sample standard deviation s? A. 44.33 B. 41.6 C. 83.2 D. 54.38 E. none of the preceding

Answer 1