Data Sets and Distributions

What is the IQR ? (interquartile range)

• 4

• 5

• 6

• 13

Is this data set symmetric?

• Yes

• No

What is the median number of hours students spent doing homework?

• 5

• 7

• 9

• 11

What is the IQR of this data?

• 5

• 6

• 8

• 9

Which sport shows the least variabilty?

• Basketball

• Football

• Hockey

• Baseball

A local library showed a movie during a children’s festival. Jada recorded the ages of 100 children who watched the movie. Here is a histogram for her data.

Can the histogram be used to estimate the mean age of the movie watchers?

• Yes

• No

In general, the higher the MAD, the higher the variability of the data.

• True

• False

Can the histogram be used to find the exact median age of the movie watchers?

• Yes

• No

Has data values that are numbers (usually), quantities, or measurements instead of words

• Categorical Data

• Numerical Data

• Frequency

• Distribution

a graphical display representing numerical data by grouping the data into intervals and showing how many values are in each interval using vertical bars that touch 

• Dot Plot

• Histogram

• Box Plot

• Mean