Round 2 Statistics Review

Select ALL the statistical questions.

• How many months are in a year?

• What is the most common birth month in this school?

• What is the average yearly income for engineers?

• What is the typical shoe size for 8th graders in this school?

• How tall is the Empire State Building?

Answer explanation

To answer a statistical question, you collect data from multiple people or things.

Find the MEAN (remember to add the numbers up and then divide by how many numbers there are)

22, 24, 25, 26, 30, 35

• 25

• 27

• 22

• 25.5

Classify this data set as CATEGORICAL OR NUMERICAL... the brand of shoes the students in your class are wearing

• Categorical

• Numerical

Find the MEDIAN of this set of numbers (*don't forget you need to FIRST put the numbers in order before you can find the median)

28, 45, 25, 32, 20, 39, 50

• 30

• 35,5

• 25

• 32

Find the MODE..(*remember the MODE is the MOST)

21, 35, 10, 62, 21, 25, 18

• 21

• 62

• 3

• 35

Find the range of the following sets of data (* Remember Range = Maximum – Minimum)

44, 50, 55, 56, 62, 68, 70

• 25

• 26

• 36

• 34

The ages of 10 boys are listed below.

7, 6, 8, 6, 8, 7, 8, 7, 8, 6

• The data have range 2, and are otherwise unrelated.

• The data are evenly distributed, with a mean of 7.1.

• The data contain outliers, so the mean is not the best measure.

• The data has no mode.

Chad earned the following test scores:

70, 85, 100, 87, 80, 70, 95, 91

Which measure would you use to show how much he improved?

• Mean

• Median

• Mode

• Range

What do you do if there are two numbers in "the middle" when you are finding the median?

• Pick the smaller number of the two.

• Add the two numbers in the middle & then divide by two.

• They are both the median

• Add the two numbers in the middle & then multiply by two.

What is the range?

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