Stats 1.5 Check in

1) Researchers collected data on calories per serving for 77 brands of breakfast cereal. The histogram displays the data. Which statement about the overall shape of the distribution of calories per serving is true?

• The shape of the distribution is roughly symmetric with two peaks.

• The shape of the distribution is slightly skewed to the left with a single peak.

• The shape of the distribution is slightly skewed to the right with a single peak.

• The shape of the distribution is roughly symmetric with a single peak.

2) The return on a stock is the change in its market price plus any dividend payments made. Return is usually expressed as a percent of the beginning price. The figure shows a histogram of the distribution of monthly returns for the U.S. stock market over a 273-month period. Which statement about the overall shape of the distribution of monthly returns is true?

• The shape of the distribution is slightly skewed to the left with a single peak.
• The shape of the distribution is slightly skewed to the right with a single peak.
• The shape of the distribution is roughly symmetric with a single peak.
• The shape of the distribution is slightly skewed to the left with two peaks.

3) There are many ways to measure the reading ability of children. One frequently used test is the Degree of Reading Power (DRP). In a research study on third-grade students, the DRP was administered to 44 students. Their scores are shown on the histogram below: Which statement about the distribution of DRP scores is NOT true?

• The distribution of DRP scores is approximately symmetric.
• The distribution of DRP scores vary from 14 to 54.
• The distribution of DRP scores does not appear to have any outliers.
• The distribution of DRP scores has a center between 30 and 36.

4) Suppose the histogram shows the distribution of test scores for Ms. Bassoe's first grade class. Select all terms that describe the shape of the histogram.

• left skewed
• an apparent outlier present
• fairly symmetric
• right skewed
• bimodal (means it has two modes/peaks)

5) The following histogram shows the number of miles Bryan ran each day in preparation for a half marathon. The bar with endpoints 1 and 3 has a height of 6. What does this mean?

• There were between 1 and 3 days in which Bryan ran 6 miles.
• Bryan ran 6 miles on days 1, 2, and 3.
• There were 2 days when Bryan ran 6 miles.
• There were 6 days when Bryan ran between 1 and 3 miles.

6) Researchers collected data on calories per serving for 77 brands of breakfast cereal. The histogram displays the data. About what percent of the cereal brands have 130 or more calories per serving?

• 2.60%
• 7.80%
• 10.40%
• 89.60%

7) Researchers collected data on calories per serving for 77 brands of breakfast cereal. The histogram displays the data. What is the maximum value of this distribution?

• The maximum value is 30 calories per serving.
• The maximum value is 155 calories per serving.
• The maximum value is 160 calories per serving.
• The exact value for the maximum number of calories per serving cannot be identified because we only have a histogram of the calories, not the actual data.

8) Researchers collected data on calories per serving for 77 brands of breakfast cereal. The histogram displays the data. What is the approximate center of this distribution?

• The center of the distribution is between 90 and 100 calories.
• The center of the distribution is between 110 and 120 calories.
• The center of the distribution is between 120 and 130 calories.
• The center of the distribution is between 130 and 140 calories.