Measures of Center

How do you find the mean of a set of numbers?

• Find the middle number after putting them in order from least to greatest.

• Find the number that appears the most.

• Subtract the lowest number from the highest number.

• Add all the numbers up and divide the sum by by how many numbers you have.

What is the median height?

52 in, 54 in, 54 in, 55 in, 60 in, 62 in, 64 in

• 55 inches

• 54 inches

• 12 inches

• 57.3 inches

Find the mode:
5, 0, 9, 9, 3, 0, 5, 5, 4

• 9
• 5
• 3
• 7

Tags

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Paulo got these grades in three tests: 72, 80 and 82. He had one more test to take. He wanted an mean of 80 for the four tests. What mark must he get in the fourth test?

• 80

• 234

• It is not possible for him to get a mean of 80

• 86

Tags

CCSS.7.EE.B.3

Mrs. Rosenblatt's class has an average grade of 87. Later on she realizes she left out Joe's score. His grade was a 65. The new mean will ,....

• increase
• decrease
• stay the same

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Ms. Rork's class had a range of test grades from 78 to 97. She forgot to add in a student who got an 80% on the test. How will this affect the range?

• Increase
• Decrease
• Stay the Same

Tags

CCSS.4.MD.B.4

The mode score on the 6th grade math test was 94! Which of these interpretations MUST be correct?

• 94 was the highest score on the test.
• More students received a 94 than any other score
• No student scored below a 94
• A score of 91 was slightly below average.

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Which is the correct data set for the dot plot?

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 
• 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 7, 9
• 1, 2, 3, 4, 5, 7, 9

Tags

CCSS.6.SP.B.4

What is the range of the following set of data?

34, 67, 29, 30, 18, 18, 45, 2, 60

• 18

• 2

• 65

• 30

A(n) ____ of a data set is much greater or much less than the other data values.

• mean

• median

• mode

• outlier

Tags

CCSS.HSS.ID.A.3