Chapter 1 AP Statistics Practice Test

You record the age, marital status, & earned income of a sample of 1,463 women. The number of variables you have recorded is:

• 3 quantitative, 0 categorical
• 4 quantitative, 0 categorical
• 2 quantitative, 1 categorical
• 3 quantitative, 1 categorical

Consumers Union measured the gas mileage in miles per gallon of 38 vehicles from the same model year on a special test truck. The pie chart provides information about the country of manufacture of the model cars tested by Consumers Union. Based on the pie chart, we conclude that

• Japanese cars get significantly lower gas mileage than cars from other countries.
• U.S. cars get significantly higher gas mileage than cars from other countries.
• Swedish cars get gas mileages that are between those of Japanese and U.S. cars.
• More than half of the cars in the study were from the United States.

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CCSS.7.SP.A.1

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Earthquake intensities are measured using a device called a seismograph, which is designed to be most sensitive to earthquakes with intensities between 4.0 and 9.0 on the Richter scale. Measurements of nine earthquakes gave the following readings:
4.5   L   5.5   H   8.7   8.9   6.0   H   5.2
where L indicates that the earthquake had an intensity below 4.0 and an H indicates that the earthquake had an intensity above 9.0. The median earthquake intensity of the sample is 

• 5.75
• 6.00
• 6.47
• 8.70

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CCSS.HSS.IC.A.1

CCSS.HSS.ID.A.2

In a statistics class with 136 students, the professor records how much money (in dollars) each student has in his or her possession during the first class of the semester. The histogram shows the data that were collected.
The percentage of students with less than $10 in their possession is closest to 

• 30%
• 35%
• 60
  45%
• 60%

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CCSS.HSS.ID.A.1

In a statistics class with 136 students, the professor records how much money (in dollars) each student has in his or her possession during the first class of the semester. The histogram shows the data that were collected.
Which of the statements about the distribution is not correct?

• The histogram is right skewed.
• The median is less than $20.
• The IQR is $35.
• The mean is greater than the median.

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CCSS.HSS.ID.A.1

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Forty students took a statistics examination having a maximum of 50 points.The score distribution is given in the following stem-and-leaf plot.
The third quartile of the score distribution is equal to 

• 32
• 45
• 44
• 43

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CCSS.6.SP.A.1

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The mean salary of all female workers is $35,000. The mean salary of all male workers is $41,000. What must be true about the mean salary of all workers?

• It must be $38,000.
• It must be larger than the median salary.
• It could be any number between $35,000 and $41,000.
• It must be larger than $38, 000.

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CCSS.HSS.ID.A.2

A survey was designed to study how business operations vary according to their size. Companies were classified as small, medium, or large. Questionnaires were sent to 200 randomly selected businesses of each size. Because not all questionnaires in a survey of this type are returned, researchers decided to investigate the relationship between the response rate and the size of the business. The data are given in the following two way table.
What percent of all small companies receiving questionnaires responded?

• 33.3%
• 62.5%
• 20.8%
• 50.8%

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CCSS.HSS.CP.A.4

CCSS.HSS.ID.B.5

A survey was designed to study how business operations vary according to their size. Companies were classified as small, medium, or large. Questionnaires were sent to 200 randomly selected businesses of each size. Because not all questionnaires in a survey of this type are returned, researchers decided to investigate the relationship between the response rate and the size of the business. The data are given in the following two way table.
Which of the following conclusions seems to be supported by the data?

• There are more small companies than large companies in the survey.
• Small companies appear to have a higher response rate than medium companies.
• Overall, more than half of companies responded to the survey.
• If we combined the medium and large companies, then their response rate would be equal to that of the small companies.

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CCSS.HSS.CP.A.4

CCSS.HSS.IC.A.1

CCSS.HSS.ID.B.5

An experiment was conducted to investigate the effect of a new weed killer to prevent weed growth in onion crops. Two chemicals were used: the standard weed killer (C) and the new chemical (W). Both chemicals were tested at high and low concentrations on a total of 50 test plots. The percent of weeds that grew in each plot was recorded. Here are some boxplots of the results. Which of the following is not a correct statement about the results of this experiment?

• At high and low concentrations, the new chemical (W) gives better weed control than the standard weed killer (C).
• The results for the standard weed killer (C) are less variable than those for the new chemical (W).
• High and low concentrations of either chemical have approximately the same effects on weed growth.
• Some of the results for the low concentration of weed killer W show fewer weeds growing than some of the results for the high concentration of W.

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CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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