Question

2231 Toklam Lagged in as bria MATHEMATICAL ASSOCIATION OF AMERICA webwork/stat2231 toktam/hw 1/4 HW 1: Problem 4 Previcus Problem List (t point) On a Friday attemoon, I give an exam to 68 stucdents. I'm ready to start the weekend and certainly don't want to grade them all right now, but I randomly select 5 to grade just to gen an idea how students did. The average of the 5 exams is an 84 (a) Which number in this paragraph represents a sample statistic? A. 84. B. 5 C. 68. D. None of the above tb) Which number in this paragraph represents a population parameter? B. 84 C. 68 D. None of the above. Note: You can eam partial credit on this problem Preview My Answers Submit Answers You have attempted this problem 0 times. You have unimited attempts remaining Email Instructor 3 4 5 9

Answer 1

(a) The number 84 represents a sample statistic in this question. It is called a sample statistic since it is a the average grade of a sample of 5 students in the class and it is therefore a real valued function of sample observations, which is the definition of a sample statistic.

(b) None of the above. There are no such number in the paragraph which represents a population parameter. Population parameters are unknown population characteristics which we try to estimate by taking random samples from the population.