Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.In the past,the test scores have been normally distributed with a mean of 74.2 and a standard deviation of 30.9.A 95% confidence interval estimate if your class has 30 students is:
A) 68.72 to 79.68.
B) 13.64 to 134.76.
C) 64.92 to 83.48.
D) 62.66 to 85.73.
E) 63.14 to 85.26.

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The Answer of Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.In the past,the test scores have been normally distributed with a mean of 74.2 and a standard deviation of 30.9.A 95% confidence interval estimate if your class has 30 students is:
A) 68.72 to 79.68.
B) 13.64 to 134.76.
C) 64.92 to 83.48.
D) 62.66 to 85.73.
E) 63.14 to 85.26.

Your Statistics Instructor Wants You to Determine a Confidence Interval