Question

scores on a mathematics assessment test for eighth - graders have a mean of 281, a 10th percentile of 231, a 25th percentile of 251, a 75th percentile of 301, 90th percentile of 329. interpret each of these numerical descriptive measures. interpret the mean value of 281. choose the correct answer below. a. for this problem, the mean value of 281 represents the range of test scores on a mathematics assessment test for eighth - graders. b. for this problem, the mean value of 281 represents the variation in the test scores on a mathematics assessment test for eighth - graders. c. for this problem, the mean value of 281 represents the middle test score when the scores are arranged in ascending (or descending) order. d. for this problem, the mean value of 281 represents the average test score on a mathematics assessment test for eighth - graders.

Explanation:

The mean is calculated by summing all data - points and dividing by the number of data - points. It represents the average value. In the context of test scores, the mean score of 281 is the average test score of eighth - graders on the mathematics assessment test.

Answer:

D. For this problem, the mean value of 281 represents the average test score on a mathematics assessment test for eighth - graders.