Statistics

What is the mode?

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

What is the range?

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

Tags

CCSS.4.MD.B.4

A data set can have more than one median?

• True
• False
• What's a Median?

what is the advantage of the median compared to mean

• it is easy to calculate
• it takes little time to find the answer
• it is not affected by extreme scores
• it can be used for nominal data

Standard deviation is always the __________ of variance.

• square root
• square
• median of
• mean of

If the standard deviation of a data set is 4, what is the variance?

• 2
• 16
• 4
• 8

The standard deviation for 4 data sets are shown.  Which has all of the data points the same as the mean?
A          4.3
 B           2.7
C             0
D            6

• A
• B
• C
• D

Adam's Z-score on a test is +2.5.  What does this mean?

• He'd better start studying.
• He did better than EVERYONE.
• He scored 2.5 standard deviations above the average.
• He did terrible.

Joanne's Z-score is -1.5.  What does this mean?

• She didn't take the test yet.
• She scored 1.5 standard deviations below the average.
• She did better than most people.
• No clue

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1
• 2
• 3
• 4