Spread of the Data

A  number that is either MUCH larger or MUCH smaller than the rest of the numbers is a(n)

• outlier

• inlier

• lier

• I'm lying

What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

Which of the following is a measure of variability?

• mean

• median

• mode

• standard deviation

What is the range?

• average

• biggest-smallest

• the middle #

• # happening the most

What is the frequency for the diameters that range from 1.1 to 2.0?

• 2

• 3

• 5

• 7

Which store has a more varied data? (Show the needed math work) Range = Highest Value − Lowest Value Interquartile Range = Quartile 3 − Quartile 1

• Store V, based on RANGE

• Store S, based on INTERQUARTILE RANGE

• Both stores have equally varied data, based on RANGE

• Both stores have equally varied data, based on INTERQUARTILE RANGE

Any outliers in the dot plot?

• Yes, 14

• Yes, 9, 10 and 14

• No

• No, 0 because top-winning countries shouldn't have 0 medals

What is the effect of a high outlier on the range of a data set?

• It decreases the range.

• It increases the range.

• It has no effect on the range.

• It halves the range.

What does the interquartile range (IQR) measure?

• The range of the entire data set

• The spread of the middle 50% of the data

• The average value of the data set

• The difference between the mean and median

Describe the shape of the graph.

• Skewed right

• Skewed left

• Uniform

• Symmetrical