Use the following to answer the questions below:
According to ESPN.com, the average number of yards per game for all NFL running backs with at least 50 attempts in the 2011 season was 49 yards/game. A sample of 20 running backs from the 2011 season averaged 46.54 yards/game.
-Two boxplots are shown. One boxplot corresponds to the yards/game for a random sample of
running backs. The other boxplot represents the values in a sampling distribution of 1,000 means of yards/game for samples of size n = 20.

Which boxplot represents the sample? Which boxplot represents the sampling distribution?
A) Boxplot A is the sampling distribution while Boxplot B is a single sample.
B) Boxplot B is the sampling distribution while Boxplot A is a single sample.

Question

Use the following to answer the questions below:
According to ESPN.com, the average number of yards per game for all NFL running backs with at least 50 attempts in the 2011 season was 49 yards/game. A sample of 20 running backs from the 2011 season averaged 46.54 yards/game.
-Two boxplots are shown. One boxplot corresponds to the yards/game for a random sample of  
 running backs. The other boxplot represents the values in a sampling distribution of 1,000 means of yards/game for samples of size n = 20.

Which boxplot represents the sample? Which boxplot represents the sampling distribution?
A) Boxplot A is the sampling distribution while Boxplot B is a single sample. 
B) Boxplot B is the sampling distribution while Boxplot A is a single sample.

Quizplus · Accepted Answer

Boxplot A is the sampling distribution while Boxplot B is a single sample. The values plotted in A are sample means, which will have less variability than the data on individual running backs.

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