Question

on a certain saturday, the sales records of 78 employees were examined. 32 of the employees worked the morning shift and 46 of them worked the afternoon shift. the following statistical information was calculated from the number of sales of each employee (shown in the chart).

	morning shift workers	afternoon shift workers
median	30	33
mode	20	31
range	44	42

based on these samples, which conclusion can be made?

a. the morning - shift workers sold more units per unit of time on average.
b. the morning - shift workers sold the same number of units as the afternoon - shift workers.
c. the morning - shift workers sold less units than the afternoon - shift workers.
d. not enough information is provided to draw any of these conclusions.

Explanation:

We are given the mean, median, mode and range of sales for morning - shift and afternoon - shift workers. But these are just descriptive statistics for samples. Without information about the population parameters, sample sizes, and the nature of the data distribution (e.g., normal distribution), we cannot make definitive comparisons between the two groups.

Answer:

D. Not enough information is provided to draw any of these conclusions