Question 1

A medical research team studied the ages of 34 patients who suffered stress strokes. If you are to create a frequency table with 8 bins starting at age 25, which of the following tables is correct?

Accepted Answer

Age 25-30: 4, 31-36: 6, 37-40: 5, 41-45: 5, 46-55: 5, 56-58: 4, 59-62: 4, 63-64: 0

Question 2

Given the following body temperatures (°F) of randomly selected subjects, which relative frequency table is correct if you use seven classes: 96.9-97.2, 97.3-97.6, 97.7-98.0, etc. (rounded to the nearest tenth of a percent)?

Accepted Answer

96.9-97.2: 5%, 97.3-97.6: 7.5%, 97.7-98.0: 12.5%, 98.1-98.4: 27.5%, 98.5-98.8: 37.5%, 98.9-99.2: 7.5%, 99.3-99.6: 2.5%

Question 3

A teacher asked each of her students how many novels they had read in the previous six months. What is the cumulative frequency for 7 novels read?

Accepted Answer

40

Question 4

A casino survey asked 200 patrons what game they played most. The results were: Slots (60), Blackjack (60), Craps (30), Roulette (10), Poker (10), Unsure (30). Which Pareto chart correctly represents the percentages?

Accepted Answer

The chart with Slots and Blackjack at 30%, Craps and Unsure at 15%, Roulette and Poker at 5% each.

Question 5

Refer to the histogram of systolic blood pressure readings for people aged 25-40. Approximately what percentage had a systolic blood pressure reading greater than or equal to 130 mmHg?

Accepted Answer

26%

Question 6

A poll asked, 'To what degree are you satisfied with the outcome of the 2006 mayoral election?' The results were: Very 17%, Somewhat 22%, Not at All 39%, No opinion 22%. Which pie chart correctly represents this data?

Accepted Answer

The pie chart with four labeled sections: Very 17%, Somewhat 22%, Not at All 39%, No opinion 22%.

Question 7

Given the following frequency table for ages of employees: 18-24: 11, 25-31: 38, 32-38: 35, 39-45: 27, 46-52: 22, 53-59: 14, 60-66: 5. Which line chart correctly represents this data?

Accepted Answer

The line chart with the highest point at 25-31, then decreasing for each subsequent age group.

Question 8

The stem-and-leaf diagram below shows the highest wind velocity ever recorded in 30 different U.S. cities. How many of the maximum wind velocities are 85 miles per hour or higher?

Accepted Answer

17

Question 9

Refer to the graph 'GPA's over 5 Decades since 1950.' Which class had more than half of students with a GPA of 2.5 or better for all five decades?

Accepted Answer

Sr

Question 10

Using the bar graph of quarterly revenue for 1999 and 2000, in which quarter was the revenue the greatest for 1999?

Accepted Answer

Fourth quarter

Question 11

Find the mean for the following sample data (in inches): 3.5, 1.6, 2.4, 3.7, 4.1, 3.9, 1.0, 3.6, 4.2, 3.4, 3.7, 2.2, 1.5, 4.2, 3.4, 2.7, 0.4, 3.7, 2.0, 3.6. Round your answer to two decimal places.

Accepted Answer

$$2.94\ 	ext{in.}$$

Question 12

Find the median for the following sample data (weights in ounces): 0.81, 1.42, 0.82, 1.62, 0.79, 0.82, 1.41, 1.42, 1.53, 0.95, 0.81, 1.25, 1.07, 0.82, 0.47, 1.25, 0.82, 1.07, 1.72, 0.79, 0.56.

Accepted Answer

$$0.95\ 	ext{oz}$$

Question 13

Find the mode(s) for the following sample data (speeds in mph): 41.0, 41.6, 43.2, 41.3, 43.6, 43.6, 41.6, 42.5, 45.0, 41.3, 41.0, 42.5, 41.3, 44.3, 41.6, 42.9, 42.9, 43.2, 40.5, 41.0.

Accepted Answer

41.0 mph, 41.3 mph, 41.6 mph

Question 14

A car manufacturer has four models averaging 18 mpg. The government standard is 33 mpg. What must the mileage of a new model be so that the manufacturer meets the government requirement?

Accepted Answer

$$93\ 	ext{mpg}$$

Question 15

Fred, a mechanic, gathered the following data for oil and filter change prices at twelve stations: 32.95, 24.95, 26.95, 28.75, 18.90, 28.50, 30.95, 22.95, 24.95, 26.95, 29.75, 28.00. What is the range?

Accepted Answer

$$14.05$$

Question 16

The test scores of nine students are: 61, 79, 35, 54, 85, 55, 56, 83, 77. What is the standard deviation? (Round to one decimal place.)

Accepted Answer

$$16.9$$

Question 17

The following data set is the GPAs of students in a statistics class: 1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75, 2.75, 2.80, 2.80, 2.85, 3.02, 3.12, 3.22, 3.31, 3.33, 3.45, 3.69. What percentile is a GPA of 2.34?

Accepted Answer

About the 30th

Question 18

The National Education Association collects data on the number of years of teaching experience of high-school teachers. A sample of 19 teachers yielded: 33, 14, 1, 20, 31, 9, 3, 11, 2, 22, 25, 1, 33, 28, 6, 17, 23, 21, 31. What is the five-number summary?

Accepted Answer

low = 1, lower quartile = 5.25, median = 18.5, upper quartile = 25.75, high = 33

Question 19

The systolic blood pressure of a group of 18-year-old women is normally distributed with a mean of $$113$$ mmHg and a standard deviation of $$13$$ mmHg. What percentage of women have a systolic blood pressure within 3 standard deviations of the mean?

Accepted Answer

$$99.7\%$$

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