A136- Measures of Central Tendency and Dispersion

1. Carly has grades of 86, 63 and 76 on three math tests. What grade must she receive on the next test to have an average of 80 for the 4 tests?

100

95

80

97

Question 1 of 10

2. A store-owner decided to keep a tally of all the colors of t-shirts in his store. Which measure of central tendency should he use to determine the most popular shirt color?

mean

range

mode

minimum

Question 2 of 10

3.

9, 8, 5, 9, 12, 8, 7, 6, 5, 9, 12, 6

What is the mean of the values above?

8

12

6

7

Question 3 of 10

4. A teacher recorded her students’ quiz grades (score out of 20) in the table below.

A136_4

If the average score was 18, how many of her students received a score of 19?

7

8

9

10

Question 4 of 10

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

{2,3,3,4,5,20}

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

{20,30,40,10,40,20}

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

Question 5 of 10

6.

A teacher recorded the following scores on a test:

23, 70, 75, 76, 77, 80, 82, 84, 86, 89, 90, 92, 93, 95, 97

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

median

range

mode

mean

Question 6 of 10

7. The data table below displays the frequency of scores on a 10 point test. Find the median score.

7.5

8

9

10

Question 7 of 10

8.

Find range for the data set below:

{3, 4, 8, 2, 7, 5, 5, 1, 3, 6}

6

8

7

4

Question 8 of 10

9. In the summer, the average amount earned in a day by 120 juniors was $50, while 150 seniors averaged $75, what were the average earnings in one day for the combined group?

$65.47

$63.89

$62.50

$60.36

Question 9 of 10

10.

Based on the data set below,

{3, 6, 12, 15, 12, 3, 6, 17, 18, 2, 3, 17, 13, 12, 15, 3}

What is the mode?

12

15

3

17

Question 10 of 10