Refer to the following information from a frequency distribution for heights of college women recorded to the nearest inch: the first two class midpoints are 62.5" and 65.5". What are the class limits for the lowest class?
A)61 and up to 64
B)62 and up to 64
C)62 and 65
D)62 and 63

Question

Quizplus · Accepted Answer

The difference between the two given midpoints is 3 inches (65.5" - 62.5" = 3"), indicating the class width. Since the midpoint of a class is the average of its lower and upper limits, and the first midpoint is 62.5", the lower limit of the first class must be 1.5" less than 62.5" (since half of the class width is 1.5"), which is 61". The upper limit of the first class must be 1.5" more than 62.5", which is 64". Therefore, the first class limits are 61 and up to 64.

Refer to the Following Information from a Frequency Distribution for Heights