review for stats quiz math 1

To find the mean of a set of numbers, add up all the items and divide by...

• 2
• The minimum
• The maximum
• The number of items

In order to find the median, the data must be sorted from least to greatest first.

• True
• False

What is the mode?

• # happening the most
• the average
• biggest - smallest
• the middle #

To find the ______ you put all numbers in order from least to greatest and then take the largest number minus the smallest number.

• Mean
• Median
• Mode
• Range

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?

• 193
• 127
• 60
• 66

Find the first quartile.

• 1

• 11

• 15

• 20

Find the inter quartile range(IQR).

• 23

• 9

• 4

• 19

What percent of the data lies within each quartile?

• 25%

• 50%

• 75%

• 100%

What percent of the data lies within inter quartile range(IQR)?

• 25%

• 50%

• 75%

• 100%

Which car club has the higher median?

• Cruisers

• Car Hops

• Neither. Can't determine median from the graph.