A136B- Measures of Central Tendency and Dispersion

1. Pearl has grades of 89, 65, and 78 on three math tests. What grade must she receive on the next test to have an average of 83 for the 4 tests?

100

95

80

97

Question 1 of 10

2. Lara is doing a project on the health of the student body. She records the height of 50 boys in the 12th grade. Which measure of central tendency should she use to determine the average height of 12th grade boys?

Mean

Range

Mode

Minimum

Question 2 of 10

3. 12, 10, 19, 4, 18, 14, 17, 14, 16, 20, 13, 11

What is the mean of the values above?

9

14

12

11

Question 3 of 10

4. A teacher recorded her students' quiz grades (score out of 10) in the table below.

If the average score was 8, how many of her students received a score of 7?

7

8

9

10

Question 4 of 10

5. Which of the following data sets contain an outlier?

{9,11,15,14,13}

{1,2,3,4,5,4,2,16}

{1,2,5,8,6,}

{16,16,18,17,15,19}

Question 5 of 10

6. A teacher recorded the following scores on a test: 25, 73, 74, 78, 79, 85, 81, 88, 83, 80, 97, 93, 92, 99, 90

Which central tendency measurement should the teacher use in order to get the most accurate depiction on how the students did?

Median

Mode

Range

Mean

Question 6 of 10

7. The data table below displays the frequency of scores on a 20 point test. Find the median score.

17.5

18

19

20

Question 7 of 10

8. For the data set below:
{13,24,8,12,12,9,13,12,20,16}

Find the range.

11

16

12

14

Question 8 of 10

9. In a summer employment program, the average amount earned in a day by 90 juniors was $50, while 140 seniors averaged $75. What were the average earnings in one day for the combined group?

$65.22

$62.88

$62.50

$64.38

Question 9 of 10

10. Based on the data set below:
{3,8,11,15,8,15,18,12,5,12,13,8,2,12,15,8}

What is the mode?

12

15

3

8

Question 10 of 10