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# We studied a characteristic of iron. Under the normality assumption of its distribution and using its...

## Question

###### We studied a characteristic of iron. Under the normality assumption of its distribution and using its...

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

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