Question

use the given minimum and maximum data entries, and the number of classes, to find the class width, the lower class limits, and the upper class limits. minimum = 9, maximum = 73, 6 classes the class width is 11. choose the correct lower class limits below. a. 9, 20, 31, 42, 53, 64 b. 9, 19, 31, 41, 52, 64 c. 20, 30, 42, 53, 64, 74 d. 19, 30, 42, 52, 63, 74 choose the correct upper class limits below. a. 19, 30, 42, 53, 63, 74 b. 20, 31, 41, 52, 64, 74 c. 19, 30, 41, 52, 63, 74 d. 20, 31, 42, 53, 64, 74

Explanation:

Step1: Determine lower class limits

The first lower - class limit is the minimum value, which is 9. Then, we add the class width (11) successively to get the other lower - class limits. 9+11 = 20, 20+11 = 31, 31+11 = 42, 42+11 = 53, 53+11 = 64.

Step2: Determine upper class limits

The upper - class limit of the first class is the lower - class limit of the second class minus 1. Since the lower - class limit of the second class is 20, the upper - class limit of the first class is 19. Then, we add the class width (11) successively to get the other upper - class limits. 19+11 = 30, 30+11 = 41, 41+11 = 52, 52+11 = 63, 63+11 = 74.

Answer:

Lower class limits: A. 9, 20, 31, 42, 53, 64
Upper class limits: C. 19, 30, 41, 52, 63, 74