Find the mean:
28, 18, 19, 18, 17

• 20

• 18

• 11

• 19

Calculate the mean.

• 8

• 4

• 7

• 22

Find the median:
3, 5, 7, 4, 3, 1

• 3 and 4

• There isn't one

• 3.5

• 3

On the semester final, Joe scored 85, Jill scored 89, and Bill scored a 99.What was the average score for these students? _________

• 91

• 273

These data show the ages of students in a community play: 12, 9, 11, 9, 15, 11, 9, 11, 12. Which data point could be removed from the set without changing the mean or the median of the data?

• 9

• 11

• 12

• 15

Answer explanation

Removing the data point '9' will not change the mean or median as it appears multiple times in the set, thus not affecting the central tendencies.

A. The student saw that this will not change the median.

B. Correct. The student demonstrated an ability to describe the impact that deleting a data point has on the mean and

the median of a data set.

C. The student saw that this will not change the median.

D. The student saw that this will not change the median.

Tags

PA.D.1.1

• A

• B

• C

• D

Lila recorded the number of minutes she exercised each day for 6 days. Her data are listed below. 62, 45, 56, 72, 35, 48What are the mean and median of Lila's data set? Complete the outcome by selecting the correct answers from the drop-down menus. Mean: ​ (a)   Median: ​ ​ (b)  

• 53

• 52

• 54

• 55

• 56

Lila recorded the number of minutes she exercised each day for 6 days. Her data are listed below. 62, 45, 56, 72, 35, 48What are the mean and median of Lila's data set? Complete the outcome by selecting the correct answers from the drop-down menus. Mean: ​ (a)   Median: ​ ​ (b)  

• 53

• 52

• 54

• 55

• 56

Kylie recorded her test scores for her past nine assignments.

73.5, 70.0 , 67.5, 83.0, 91.0, 87.3, 67.5, 90.0, 70.0

What are the mean and median of this data set?

Mean​​ (a)   Median​ ​ (b)  

• 73.5

• 77.75

• 70.0

• 71.5