Summary Statistics

Which person's dot plot would you expect to have a higher IQR?

• Elena

• Jada

• Lin

Which class period has less variability in their test scores? (least spread out) Approximate the Interquartile Range (IQR) for that class period.

All of the below sets have the same median.
Set 1-IQR=3.1
Set 2-IQR=4.9
Set 3-IQR=1.7
Set 4-IQR=3.2
Which set of data is the most consistent?

• 1

• 2

• 3

• 4

Which data set is the most spread out?

• IQR: 1.15

• IQR: 2.15

• IQR: 1.05

• IQR: 3.15

The number of students (class size) in each of 7 classes is shown below. Which class size affects the range of all 7 classes the most?

• 15

• 25

• 29

• 32

Abe found the mean and median of this list of numbers.

1, 3, 3

If the number 6 were added to the list, then

• the mean would increase

• the mean would decrease

• the median would increase

• the median would decrease

Sandy keeps track of the number of visitors to her website for 6 days.75 76 82 105 90 100The number of visitors to her website on day 7 is  88. Which measure would change if Sandy adds 88 to the list?

• mean

• range

• median

A data set has 7 values.

4, 6, 10, 10, 12, 18, 24

The value 4 is removed from the data set. How is the mean affected?

• the mean increases

• the mean decreases

• the mean stays the same

There are 5 children in Isabella’s family including Isabella. Their ages are listed below. 1, 4, 4, 11, 15 Which of the following measures will not change when the children are all 5 years older?

• mean

• median

• mode

• range

Roxanne’s first six test scores were 75, 75, 95, 75, 90, and 60. On her seventh test she received a score of 95.

Which measure of data changed because of Roxanne’s seventh test score?

• mean

• median

• mode

• range