Exhibit 10

question 81

Multiple Choice

Exhibit 10.6.A university wants to compare out-of-state applicants' mean SAT math scores (μ₁) to instate applicants' mean SAT math scores (μ₂) .The university looks at 35 instate applicants and 35 out-of-state applicants.The mean SAT math score for instate applicants was 540,with a standard deviation of 20.The mean SAT math score for out-of-state applicants was 555,with a standard deviation of 25.It is reasonable to assume the corresponding population standard deviations are equal. Refer to Exhibit 10.6.At the 5% significance level,can the university conclude that the mean SAT math score for instate students and out-of-state students differ?

• A)No,because the confidence interval contains zero.
• B)Yes,because the confidence interval contains zero.
• C)No,because the confidence interval does not contain zero.
• D)Yes,because the confidence interval does not contain zero.