Question

The randomly selected delivery times (in minutes) of two fast food restaurants are as
COURSE TOOLS

Fast Food 1 Fast Food 2
42
40
38
37
37
40
39
41
38
38
40
46
45
41
41

40
40
日
LESSON
FEEDBACK
follows.
Which of the following statements is false?
Both fast food restaurants have exactly one modal delivery time of 40 minutes.
• Both fast food restaurants have the same median delivery time of 40 minutes.
• Both fast food restaurants have the same mean delivery time of 40 minutes.
• Neither data set contains an outlier.

Answer 1

The false statement is: Both fast food restaurants have the same mean delivery time of 40 minutes.

Calculating the mean delivery time for Fast Food 1:
(42+40+38+37+37+40+39+41+38+38+40+46+45+41+41+40+40)/17 = 40.47

Calculating the mean delivery time for Fast Food 2:
(40+40+40)/3 = 40

Therefore, the mean delivery times for the two fast food restaurants are not the same.