Measures of Variability and Central Tendency

Find the mean: 67, 89, 93, 77, 84

a statistical measure of data, often the mean or median

• mode

• measure of central tendency

• interquartile range

• dot plot

the most frequently occurring value(s) in a set of data

• mode

• median

• shape

• range

the difference between the highest and lowest values in a set of data

• median

• range

• mode

• shape

the middle number of a set of values that are ordered from least to greatest

• median

• mean

• mode

• range

a measure of variability between the first and the third quartile

• range

• dot plot

• interquartile range

• measure of central tendency

(average) found by finding the sum of the data values and dividing by the number of pieces of data

• mode

• median

• mean

• shape

a graph that measures the spread of the data, including the minimum, the first quartile, the third quartile, and the maximum

• dot plot

• box plot

• median

• shape

What is the mode?

• The middle number in an ordered set of data.

• The difference between the greatest and least amount in the data set

• The value that occurs the most often in a data set

• The sum of all the numbers in a data set divided by the size

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

• Pick your favorite number

• They are both the median

• Find the mean of the two numbers

• None of the above