Question

the test scores of the students in four classes are summarized below. answer the questions about them. class a: the mean score is 110 and the range of scores is 26. class b: the mean score is 103 and the range of scores is 29. class c: the mean score is 109 and the range of scores is 32. class d: the mean score is 108 and the range of scores is 27. (a) based on the information above, which classs scores have the most variability? ○ class a ○ class b ○ class c ○ class d (b) based on the information above, which class has the lowest scores on average? ○ class a ○ class b ○ class c ○ class d

Explanation:

Step1: Identify variability metric

Range measures score variability.

Step2: Compare class ranges

Class A: 26; Class B:29; Class C:32; Class D:27.

Step3: Find lowest average score

Mean is the average score. Compare means: 110, 103, 109, 108.

Answer:

(a) Class C
(b) Class B