Stats Center Spread and Shape

Compare the centers and spreads.

• Math has a higher median (center) and is less consistent (wider spread).

• Math has a higher median (center) and is more consistent (smaller spread).

• Math has a lower median (center) and is more consistent (smaller spread).

• Math has a lower median (center) and is less consistent (wider spread).

Describe the shape of the graph

• Unimodal and Right Skewed

• Unimodal and Symmetric

• Bimodal and Symmetric

• Unimodal and Left Skewed

Which interval contained the fewest scores?

• 0-9

• 50-59

• both 0-9 and 50-59

• 10-19

How many students are represented by the histogram?

• Cannot be determined

• 9

• 31

• 35

Which summary statistic should be used to compare the two data sets and why?

• The median and the interquartile range because they are normally distributed.

• The median and the interquartile range because they are skewed.

• The mean and the standard deviation because they are normally distributed.

• The mean and the standard deviation because they are skewed.

Which statistic measures how spread out the data values are in a data set?

• mean

• mode

• maximum value

• standard deviation

Which measure of spread should be used to describe the distribution?

• standard deviation

• interquartile range

• range

• median

Which of the following is a measure of spread, or variability? (select all that apply)

• Interquartile Range

• Standard Deviation

• Mean

• Median

• Range

The histogram displays the number of hours of TV watched last week? How would you describe the shape of his distribution?

• Unimodal and skewed left

• Unimodal and skewed right

• Unimodal and symmetric

What is the range of the data?

• 80

• 10

• 70

• 40

• 30