SOL 6.11-Outliers Affect on Mean

Alice worked part-time babysitting after school The amount of money Alice earned for five weeks is shown

( $35, $28, $32, $46, $42 )

Alice then earned another $200 the sixth week. How was the mean affected by the money she made in the sixth week?

• The mean was not affected at all

• The mean remained the same after the sixth week

• The mean nearly doubled by adding the sixth weeks' earnings

• The mean when down by adding the sixth weeks' earnings

Phillip recorded his test grades for math class. His test scores for four tests are shown. ( 98, 86, 90, 95)

Phillip then made a 72 on the fifth test. How was teh mean affected?

• The mean remained the same

• The mean decreased

• The mean increased

Brooke received the math quiz grades listed below during a grading period.

( 90, 85, 65, 95, 83, 97)

Her teacher decided to drop her lowest grade. If the mean is rounded to the nearest whole number, how will dropping the lowest quiz grade affect the mean of her quiz scores?

• The mean went up by 4 points

• The mean decreased by 4 points

• The mean stayed the same and did not change

• The mean went up by 7 points

What is the outlier?

• The number in a data set that is not telling the truth

• The number in the data set that is the same as all the other numbers

• The number in the data set that is much higher or much lower than all the other numbers

• The number in the data set that has no affect on the mean

Kayla's scores on her five math tests are shown.

92, 68, 81, 89, 94

If Kayla's teacher decides to drop the lowest score, which statements are true? (check all the true statements)

• The outlier WILL affect the mean score

• The mean test score will increase by 17

• The mean test score will increase by 4.2

• The mean test score will only increase by 1

Look at the data.

55, 54, 70, 61, 72, 54, 68

If the number 62 is added to the data set, how will the mean change?

• The mean will increase

• The mean will decrease

• It will not affect the mean. The mean will remain 62

The number of goal a soccer team scored in each of the last eight games is shown

3, 1, 1, 0, 2, 1, 5, 3

They scored 4 in the eighth game. How does that score affect the mean?

• The mean will increase by 0.3

• The mean will increase by 0.2

• The mean will increase by 0.5

• There will be no change in the mean

What is the outlier in the set of data?

8, 10, 12, 15, 17, 19, 22, 89

• 8

• 10

• 12

• 89

What is the outlier in the data set?

0, 55, 56, 57, 63, 65, 66

• 66

• 65

• 0

• 56

what is the outlier in the data set?

9, 9, 5, 7, 16, 11, 18, 12, 82

• 18

• 9

• 7

• 82