Statistics basics

Calculate the RANGE for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

• 7

• 7.44

• 8

• 7 and 8

Calculate the MEDIAN for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

• 7

• 7.44

• 8

• 7 and 8

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

• 8
• 9
• 13
• 21

What is the class size of the class 15 - 30?

• 15
• 30
• 22
• 22.5

Calculate the relative frequency of having an IQ score in the 131-140 range. (200 7th graders were surveyed).

• 8%

• 4%

• 20%

• 15.5%

How many 7th graders had an IQ score in the 81-90 range?

• 13

• 6.5

• 3

• 42

Calculate the MEAN for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

• 7

• 7.44

• 8

• 7 and 8

How many data points are greater than 34?

• 10

• 11

• 12

• 13

In a discrete data, what name is given to the item occurring most frequently?

• Median
• Mode
• Mean
• Frequency

Calculate the MODE for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

• 7

• 7.44

• 8

• 7 and 8