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Statistics

1. A point estimate is defined as:

A) the average of the sample values

B) the average of the population values

C) a single value that is the best estimate of an unknown population parameter

D) a single value that is the best estimate of an unknown sample statistic

2. 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) 63.14 to 85.26

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Statistics and Probability, Statistics

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