Instruction 8-11
A sample of salary offers (in thousands of dollars) given to students majoring in management is: 28, 31, 26, 32, 27, 28, 27, 30, 31, and 29. Using this data to obtain a 95% confidence interval resulted in an interval from 27.5 to 30.3.
-Referring to Instruction 8-11,the confidence interval obtained is valid only if the distribution of the population of salary offers is normal.

Question

Quizplus · Accepted Answer

The assumption of normality is necessary for obtaining valid confidence intervals. Since there is no information to suggest otherwise, we assume that the distribution of salary offers is approximately normal. Therefore, the confidence interval obtained is valid.

Instruction 8-11 A Sample of Salary Offers (In Thousands of Dollars) Given