Statistics Review

What is the median of the following data set?

25, 42, 36, 12, 19

• 36

• 25

• 39

• 26.5

What is the mode of the following data set?

2, 4, 6, 8, 7, 9

• 2, 4, 6, 7, 8, 9

• 4

• 6

• no mode

What is the mean of the following set of data?

2, 6, 10, 31, 14, 8

• 11.8

• 71

• 12

• 14.2

What is the interquartile range of test scores for 1st Period?

• 70-95

• 75-90

• 15

• 10

Fifty percent of the test scores in 2nd Period were below what score?

• 82

• 75

• 85

• 93

At a football game, a researcher

randomly asks 100 people to name

their favorite sport. Is this a biased

sample?

• Yes

• No

Roger has the following data:

12, 10, 3, 5, 6

Susan has the following data:

5, 9, 4, 5, 6

Who has the data with the highest median and what is it?

• Roger - 6

• Susan - 7

• Roger - 8

• Susan - 5.5

A website asks a visitor to fill out an

online survey. Is this a random sample?

• Yes

• No, its voluntary

• No, its mandatory

What is the interquartile range of 2nd Periods test scores?

• 12

• 9

• 15

• 80

What is the lower quartile(Q1) for 1st Period and 2nd Period?

• 60, 70

• 75, 80

• 80, 85

• 90, 92