Use the table to answer the question.
Group A 18 20 46 34 58 31 41
Group B 15 21 32 42 29 57 39The table shows the times, in minutes, spent shopping by two different groups. First find the mean times each group spent shopping. Then determine the difference in the mean times. Round your answers to one decimal place.
The mean time Group A spent shopping is
minutes.
The mean time Group B spent shopping is
minutes.
The mean times Group A and Group B spent shopping differ by
minutes.
The mean time Group A spent shopping is 35.5 minutes.
The mean time Group B spent shopping is 33.9 minutes.
The mean times Group A and Group B spent shopping differ by 1.6 minutes.
To find the mean (average) time each group spent shopping, add up all the values in the group and divide by the total number of values.
Group A:
18 + 20 + 46 + 34 + 58 + 31 + 41 = 248
248 / 7 = 35.4
Group B:
15 + 21 + 32 + 42 + 29 + 57 + 39 = 235
235 / 7 = 33.6
The mean time Group A spent shopping is 35.4 minutes.
The mean time Group B spent shopping is 33.6 minutes.
To determine the difference in mean times, subtract the mean time of Group B from the mean time of Group A.
Difference = Group A mean time - Group B mean time
Difference = 35.4 - 33.6 = 1.8
The mean times Group A and Group B spent shopping differ by 1.8 minutes.