Statistics Review

How many students scored more than 80%?

• 10
• 13
• 7
• 15

What is the mode of the scores?

• 24
• 14
• 34
• 30

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

• Pick your favorite number
• Add the two numbers in the middle & then divide by two.
• They are both the median
• None of the above

How many students have more than 1,000 songs on their MP3 player?

• 5
• 16
• 10
• 4

How many cities have temperatures between 70 degrees and 99 degrees?

• 44
• 34
• 26
• 62

Austin hit some home runs in a game.  He hit 9, 11, 12, and 8.  He wants his mean to be 10.  How many will he need in the next game?

• 40
• 50
• 10
• 3

What measure of central tendency (mean, median or mode) would be best for the following set of data?
0, 89, 92, 97, 99, 100

• Mode, because it is the one that shows up the most.
• Median, because there is an outlier.  The outlier could be incorrect and would influence the mean too much.
• Mean, because there is not an outlier.  You should always use the mean.
• There is not a best measure of central tendency for this data.

Find the median: 12, 15, 13, 18, 23, 5?

• 14

• 16

• 16.5

• 18

What is the mode in the following numbers? [3, 24, 3, 7, 30, 1, 3, 7, 3]

• 3 and 7 both are modes

• 1 and 7 both are modes

• 3 only

• 7 only

What is the Q1 of this data set?
6, 7, 2, 1, 5, 2, 1, 6

• 1
• 1.5
• 2
• 2.5