Numerical Summaries

What is the mean of the data set graphed on the dot plot?

• 30

• 40

• 45

• 95

What are all the modes of this data set?

2, 8, 6, 8, 2, 10, 0, 5, 11

• 2 and 8

• 6

• 8

• no modes

What is the third quartile of the data?

• 68 seconds

• 89 seconds

• 115 seconds

• 122 seconds

Steph made the box-and-whisker plot shown.

What is the IQR for the data?

• 10

• 18

• 12

• 6 and 16

What is the mode of the data set graphed on the dot plot?

• 4

• 2

• 3

• 1

Brianna recorded the high temperatures in her town each day for 8 consecutive days.

Her data are shown.

78, 65, 72, 80, 68, 77, 75, 52

Which is not a true statement about the data?

• 50% of the temperatures are between 66.5 and 77.5 degrees.

• 75% of the temperatures are less than 77.5 degrees.

• 25% of the temperatures are less than 66.5 degrees.

• 50% of the temperatures are less than 77.5 degrees.

Sally earned the follow amounts the past 8 weeks.

$88, $104, $96, $112, $132, $92, $100, $116

What were her median weekly earnings of this period?

• $102

• $105

• $100

• $104

Mark made the box-and-whisker plot shown. What percent of the data in the box-and-whisker plot is below 70?

• 25%

• 40%

• 50%

• 75%

Yasi wanted to determine how many minutes students watch TV each day. She decided to do a random survey of 9 students. Then she plotted the data on a dot plot. What is the range of the data?

• 24 minutes

• 31 minutes

• 40 minutes

• 32 minutes

Which of the following is a measure of center? Select all that apply.

• mode

• mean

• range

• median