Mean, Median, Mode, Outliers

Using the information below, identify which of the following is NOT an outlier:
Q1 = 53
Q2 = 55
Q3=61

• 73

• 40

• 80

• 73.5

In order to find the median, the data must be sorted from least to greatest first.

• True

• False

Use the 1.5 IQR rule to determine if there are any outliers for the following numbers:
84, 88, 72, 74, 98, 16, 94 

• Yes, 16 is an outlier.

• Yes, 33 is an outlier.

• Yes, 98 is an outlier.

• There are no numbers less than 39 or greater than 124, therefore there are no outliers.

Mario wants to his parents to think he is doing very well in math class. His tests this quarter are 62, 50, 90, 90, and 43. Which measure of central tendency should he report to them?

• mean

• median

• mode

• IQR

Summarizes data using a single number.  The single number is found by finding the sum of the data divided by the number of pieces of data.

• Median 

• Range

• Mean

• Mode

The number(s) or items(s) that appear most often in a set of data.

• Median 

• Range

• Mean

• Mode

The value appearing at the center of a sorted version of a list, or the mean of the two central values.

• Median 

• Range

• Mean

• Mode

Numbers that are used to describe the center of a set of data.  These measures include the mean, median, and mode.

• Interquartile Range

• Measure of Variation

• Measure of Center

• Interval

A value that is much higher or much lower than the other values in a set of data.

• Outlier

• Box Plot

• Range

• Histogram

The __________ is the middle number, or the mean of the two middle numbers, of the ordered data in a set.

• mean

• range

• median

• mean absolute deviation