Measures of Center and Variation in Graphs

When finding the median what is the FIRST step?

• Mark off the lowest number

• Mark off the highest number

• Find the Middle

• Arrange the number from Least to Greatest

Which dot plot shows more consistency? a or b?

• a

• b

How do you find the Interquartile Range?

• divide the 3rd quartile by the 1st quartile

• subtract the biggest number by the smallest number

• divide the biggest number by the smallest number

• subtract the 3rd quartile by the 1st quartile

What is the IQR?

• 5.5

• 4

• 4.5

• 6

The frequency table shows the gas mileages of several vehicles. The data would be ​ (a)   so the best measure of center would be the ​ (b)   and the best measure of variation would be the ​ (c)   ​ ​

• Skewed Right

• median

• Interquartile Range

• Skewed Left

• Symmetrical

• Mean

• Mean Absolute Deviation

Read the definition and match each word to the correct box.

• Median

• Measure of variation that represents the spread of a set of data.

• Mean

• Measure of center that lies in the middle of a set of data arranged in order

• Mode

• Measure of center that occurs most often in a data set.

• Range

• Measure of center that represents the fair share of a set of data.

Read the definition and match each word to the correct box.

• Mean

• Measure of center that lies in the middle of a set of data arranged in order

• Mode

• Measure of center that represents the fair share of a set of data.

• Median

• Measure of variation that represents the spread of a set of data.

• Range

• Measure of center that occurs most often in a data set.

Which club has the smaller spread?

• Cruisers

• Car Hops

75% of the Cruisers went to more than 13 car shows. True or False?

• True

• False

What is the mode?

• Number that occurs the most

• The Average

• The difference between the highest and lowest values

• The Number in the middle