Box Plots and comparing data sets

What is the range of this data set?

• 6

• 12

• 13

• 19

Data points in the first quartile are between which two points?

• 6 and 8

• 8 and 12

• 12 and 15

• 15 and 19

What is the Interquartile Range of this data set? The lower (first) quartile is 19 and the upper (3rd) quartile is 56.

• 75

• 37

• 72

What percentage of the data is between 90 and 140?

• 25 %
• 50%
• 75%
• 100%

What is the interquartile range (IQR) of plot A?

• 6

• 8

• 15

• 28

Tom asked people in a survey how much money they could find under their sofa cushions. The stem-and-leaf plot shows the amounts of money. What is the least amount of money a person said they could find?

• 4 cents

• 45 cents

• 46 cents

• 456 cents

How many people live less than 40 miles from work?

• 4

• 10

• 9

• 11

All of the below sets have the same mean.

Set 1-Standard Deviation=3.1

Set 2-Standard Deviation=4.9

Set 3-Standard Deviation=1.7

Set 4-Standard Deviation=3.2

Which set of data probably has the points furthest to the mean?

• 1
• 2
• 3
• 4

What does a standard deviation of 0 mean?

• There is no spread of data

• The spread of data is close to the mean

• The data is more spread out from the mean

• There is no mean

Find the standard deviation of the following

2, 5, 5, 8, 11, 12

to 3 s.f.