AP Statistics Comparing Displays

According to the table, what is the relative frequency of Students ages 14 - 17 who skip breakfast?

• About 27%

• About 35%

• About 15%

• About 30%

Some descriptive statistics for a set of test scores are shown above. For this test, a certain student has a standardized score of z = -1.2. What score did this student receive on the test?

• 266.28

• 779.42

• 1008.02

• 1083.38

• 1311.98

A random sample of 374 United States pennies was collected, and the age of each penny was determined. According to the boxplot below, what is the approximate interquartile range (IQR) of the ages?

• 8

• 10

• 16

• 40

• 50

The histogram below displays the frequencies of waiting times, in minutes, for 175 patients in a dentist's office.<\/p>

Which of the following could be the median of the waiting times, in minutes?<\/p>

• 2.5<\/p>

• 7.25<\/p>

• 12.25<\/p>

• 15<\/p>

• 17.50<\/p>

Which of the following statements is correct?

• The distribution is skewed to the right.

• The distribution is skewed to the left.

• The distribution appears to be normal.

• The distribution appears to be chi-square.

• The distribution appears to be uniform.

Of the following dotplots, which represents the set of data that has the greatest standard deviation?

• 
• 
• 
• 
• 

Data were collected on the amount, in dollars, that individual customers spent on dinner in an Italian restaurant. The quartiles for these data are given in the picture. Which of the following statements must be true for these customers?

• At least half of the customers spent less than or equal to $44.27 and at least half spent greater than or equal to $44.27.

• Seventy-five percent of the customers spent between $36.27 and $58.97.

• Twenty-five percent of the customers spent less than or equal to $58.97 and the remaining 75 percent spent greater than or equal to $58.97.

• The mean amount spent by customers is $44.27.

• A majority of customers spent $44.27.

A company wanted to determine the health care costs of its employees. A sample of 25 employees were interviewed and their medical expenses for the previous year were determined. Later the company discovered that the highest medical expense in the sample was mistakenly recorded as 10 times the actual amount. However, after correcting the error, the corrected amount was still greater than or equal to any other medical expense in the sample. Which of the following sample statistics must have remained the same after the correction was made?

• Mean

• Median

• Mode

• Range

• Variance

Which of the following is the best estimate of the standard deviation of the distribution shown in the figure above?

• 5

• 10

• 30

• 50

• 60

What percentage of SUV's are driven by women?

• 56.25%

• 75%

• 83.25%

• 86.5%