In a survey of twelve Savannah State Business School graduates, the mean starting salary was $93,000, with a standard deviation of $17,000.

The 95% confidence interval for the average starting salary among all Savannah State graduates is?

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- November 9th 2007, 09:55 AMtwilMean & Standard Deviation
In a survey of twelve Savannah State Business School graduates, the mean starting salary was $93,000, with a standard deviation of $17,000.

The 95% confidence interval for the average starting salary among all Savannah State graduates is? - November 12th 2007, 08:54 AMtwilMean & Standard deviation, confidence interval
I think I have solved it and it is as follows:

R =93000 + (1.96) 17000/3.4641061513775

R = 93000 + (1.96) (4907)

R = 93000 + 9618

R = 102,618

R = 93000 - (1.96) 17000/3.4641061513775

R = 93000 - (1.96) (4907)

R = 93000 - 9618

R = 83,382

So the range of salaries would be $83,382 ; $102,618 - November 12th 2007, 02:44 PMTKHunny
I like it. Do you still doubt?