IM1 Univariate Statistics Review

What percentage of the data is between 40 and 150?

• 25 %

• 50%

• 75%

• 100%

What percent of the data is between 4.5 and 8?

• 25

• 50

• 75

• 100

What percent of the data is between 30 and 35 on the number line?

• 25%

• 50%

• 75%

• 100%

Identify the outlier for the given data?
23, 34, 27, 7, 30, 26, 28, 31, 34

• 7
• 23
• 31
• 34

Which of the following best describes the process of finding the interquartile range for a set of data?

• Add the biggest and smallest numbers.
• Place the numbers in order from least to greatest and find the middle.
• Find the difference between the maximum and the minimum.
• Subtract Q1 from Q3.

Describe the histogram:

• Left Skewed

• Normal/Symmetrical

• Right Skewed

• Uniform/Flat

If a number is added to a set that is bigger than the mean, how does this affect the mean?

• The mean increases.

• The mean decreases.

• The mean stays the same.

If a number is added to the set that is in the middle of the data, how does this affect the range?

• The range increases.

• The range decreases.

• The range stays the same.

• The range both increases and decreases.

The shape of the data is skewed left.

• TRUE
• FALSE

Describe the shape of the data.

• Uniform

• Left Skewed

• Right Skewed

• Symmetrical