The following data set shows the ages of 16 factory workers chosen at random.
Based on these data, a 90% confidence interval for is (22.754, 12.262). The workers supervisor claims that . Do the data provide strong evidence that the workers population standard deviation is smaller than 18? Test with $\alpha$=0.05.

Question

The following data set shows the ages of 16 factory workers chosen at random.
  Based on these data, a 90% confidence interval for  is (22.754, 12.262). The workers supervisor claims that  . Do the data provide strong evidence that the workers population standard deviation is smaller than 18? Test with $\alpha$=0.05.

Quizplus · Accepted Answer

The Answer of The following data set shows the ages of 16 factory workers chosen at random.
  Based on these data, a 90% confidence interval for  is (22.754, 12.262). The workers supervisor claims that  . Do the data provide strong evidence that the workers population standard deviation is smaller than 18? Test with $\alpha$=0.05.

The Following Data Set Shows the Ages of 16 Factory α\alphaα

The Following Data Set Shows the Ages of 16 Factory $\alpha$