AP Statistics Quiz 1.1 Name: Date: - Windsor High School

Page 3 6. We all “know” that the body temperature of a healthy person is 98.6°F. In reality, the actual body temperature of individuals varies...

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AP Statistics Quiz 1.1 Name: __________________________ Date: _____________

1. A survey records many variables of interest to the researchers conducting the survey. Which of the following variables, from a survey conducted by the U.S. Postal Service, is categorical? A) county of residence. B) number of people, both adults and children, living in the household. C) years lived at that address. D) age of respondent. E) total household income, before taxes, in 1993.

2. A description of different houses on the market includes the following three variables. Which of these variables is quantitative? A) the square footage of the house. B) the monthly gas bill. C) the monthly electric bill. D) the assessed value for tax purposes. E) all of the above.

Use the following to answer questions 3-4: In a statistics class with 136 students, the professor records how much money each student has in his or her possession during the first class of the semester. The histogram below is of the data collected.

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3. The percentage of students with under $10 in their possession is closest to A) 30%. B) 35%. C) 50%. D) 60%. E) 70%.

4. The histogram A) is skewed right. B) has an outlier. C) is asymmetric. D) has a mean less than 30. E) all of the above.

5. For the following histogram, what is the proper ordering of the mean and median? Note that the graph is NOT numerically precise—only the relative positions are important.

A) B) C) D) E)

I is the mean and II is the median. II is the median and III is the mean. I is the median and II is the mean. II is the mean and III is the median. I is the mean and III is the median.

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6. We all “know” that the body temperature of a healthy person is 98.6°F. In reality, the actual body temperature of individuals varies. Both parallel boxplot and a back-to-back stemplot of the body temperatures of 130 healthy individuals (65 males and 65 females) are shown below. Males

3 Males

Females

96

97

98

99

100

101

A) Determine the five-number summary for the Males. B) Determine the five-number summary for the Females. C) Determine whether the 3 points graphed by the + symbol are indeed outliers by our defined criteria. Note: A simple yes or no will NOT suffice! D) Write a brief description comparing the body temperatures of adult males and females.

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7 9 1110 32 544444 7666 998888 11000000 332222 554444 77666666 9888 1000 32 54

96 96 96 96 97 97 97 97 97 98 98 98 98 98 99 99 99 99 99 100 100 100 100 100

Females

4 7 8 22 4 677 8888999 000001 222222333 444445 6666777777 8888889 0011 223 4 9 0

8