What is the midpoint of the class 7-11 ?

Chapter 2 Test

Question 1 For the class 7 - 20, the upper class limit is a. 6.5 b. 7 c. 20 d. 20.5

Question 2 What are the boundaries of the class 12-16? a. 11.5 and 16.5 b. 10 and 18 c. 12 and 16 d. 4

Question 3 What is the midpoint of the class 7-11 ? a. 9.5 b. 9 c. 5 d. 4

Question 4 What is the lower class limit of the class 13–17? a. 15 b. 17 c. 13 d. 12.5

Question 5 What is the midpoint of the class 15–18 ? a. 1.5 b. 16.5 c. 3 d.16

Question 6 What is the upper class boundary of the class 23–35 ? a. 35 b. 7.5 c. 35.5 d. 7

Question 7 What is the lower class limit in the class 6-10 ? a. 6 b. 8 c. 6.5 d. 5.5

Question 8 What are the boundaries of the class 1.87–3.43 ? a. 1.82–3.48 b. 1.87–3.43 c. 1.879–3.439 d. 1.865–3.435

Question 9 Find the class with the least number of data values.

a. 55-65 b. 65-75 c. 75-85 d. 85-95

Question 10 Find the class with the greatest number of data values.

a. 55-65 b. 65-75 c. 75-85 d. 85-95

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Question 11 Which of the following could be a cumulative frequency graph?

a. b. c. d.

Question 12 Which of the following is a histogram?

a. b. c. d.

Question 13 Which type of graph represents the data by using vertical bars of various heights to indicate frequencies? a. ogive b. frequency polygon c. histogram d. cumulative frequency

Question 14 Which of the following is a frequency polygon?

a. b. c. d.

Question 15 Given the following frequency distribution, how many pieces of data were less than 28.5?

Class Boundaries Frequencies 13.5–18.5 4 18.5–23.5 9 23.5–28.5 12 28.5–33.5 15 33.5–38.5 17

a. 12 b. 13 c. 25 d. 44

Question 16 An automobile dealer wants to construct a pie graph to represent types of cars sold in July. He sold 72 cars, 16 of which were convertibles. How many degrees should be used for the convertibles section ? a. 60° b. 80° c. 100° d. 50°

Question 17 A weatherman records the amount of rain that fell in Portland, Oregon each day for a year. What type of graph should he use to show how rainfall changes during the year ? a. pie graph b. pictograph c. time series graph d. Pareto chart

Question 18 What type of graph is the figure below?

a. Pareto chart b. pictograph c. ogive d. pie graph

Question 19 Which graph should be used to represent the frequencies with which certain courses are taken at Highlands Middle School? a. Pareto chart b. time series graph c. pie graph d. pictograph

Question 20 Determine the type of relationship shown in the figure below.

a. positive b. negative c. multiple d. There is no relationship.

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