Making Statistics Inferences

Four fourth-grade girls and four seventh-grade girls were randomly selected. Their heights, in inches, are recorded below.

4th Grade
56, 47, 54, 51

7th Grade
57, 58, 60, 64

Which grade has the highest mean?

• 4th Grade

• 7th Grade

If Mr. Estes looked at the means (averages) for the last SAFE Quiz for his classes, and the averages were 72%, 71%, and 74%, what inference can you make based on those averages?

If Mr. Estes looked at the means (averages) for the last SAFE Quiz for his classes, and the averages were 81%, 82%, and 99%, what inference can you make based on those averages?

Based on the histograms, which is a true statement?

• DX Comics bring in more money on average.

• Marble Comics bring in more money on average.

• All Marble movies bring in more money than all DX movies.

• The amount earned by DX movies varies much more than the amount earned by Marble Movies.

Based on the histograms, which is a true statement?

• Some DX Comics movies made more than some Marble Comics Movies.

• The DX Comics movie with the greatest revenue made more than the Marble Comics movie with the greatest revenue.

• All Marble Comics movies made more money than every DX Comics movies.

Based on the Histograms, which statement is correct?

• The DX Comics movie with the greatest revenue made more than the Marble Comics movie with the greatest revenue.

• DX Comics made more movies with revenue in the $300,000-400,000 range than Marble Comics did.

• The Marble Comics movie with the greatest revenue made more than the DX Comics movie with the greatest revenue.

Based on the Box Plots, which statement is correct.

• The temperatures were higher on average in St. Louis

• The temperatures varied more noticeably in Washington, D.C.

• The temperatures had a higher measure of center in Washington, D.C.

• St. Louis had the hottest recorded temperature

Based on the Box Plots, which statement is correct.

• Washington, D.C. had the hottest temperature recorded

• Washington, D.C. had the coldest temperature recorded

• The weather varied more in Washington, D.C.

• The temperatures had a higher measure of center in St. Louis

Based on the Box Plots, which statement is correct.

• The hottest temperature was recorded in St. Louis

• St. Louis had the coldest temperature recorded

• The temperatures had a higher measure of center in St. Louis

• The lowest temperature was recorded in Washington, D.C.

Based on the Box Plots, which statement is correct.

• The weather varied more in St. Louis

• The weather varied more in Washington, D.C.

• St. Louis had the hottest temperature recorded

• Washington D.C. had the coldest temperature recorded