Measures of Center and Spread Vocabulary

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5

• 6

• 9

• 11

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.

Given the set of data below, what would be the most meaningful measure?
1, 1, 1, 1, 1, 1, 1, 1, 1, 21

• Mean

• Median

• Mode

• Range

A  number that is either MUCH larger or MUCH smaller than the rest of the numbers is a(n)

• outlier

• inlier

• lier

• I'm lying

If you have two numbers in the middle, you should

• add them together and divide by two

• find the number in between the two

• find the mean of the two numbers

• all of these

What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

If 10 is added to every value in a set of data, what will happen to the value of the median?

• it will increase by 10

• it will decrease by 10

• it will stay the same

• it will both increase and decrease

If a number is added to the set that is near the mean, how does this affect standard deviation?

• increase

• decrease

• stay the same

• both increase and decrease

Which of the following is a measure of variability?

• mean

• median

• mode

• standard deviation

sum divided by number of addends

• mean

• median

• mode

• range