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Exam 2: Organizing and Visualizing

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Question 71

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True or False: The relative frequency is the frequency in each class divided by the total number of observations.

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Question 72

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One of the developing countries is experiencing a baby boom, with the number of births rising For the fifth year in a row, according to a BBC News report.Which of the following is best for Displaying this data?

A) A Pareto chart
B) A two-way classification table
C) A histogram
D) A time-series plot

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Question 73

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You have collected data on the responses to two questions asked in a survey of 40 college Students majoring in business-What is your gender (Male = M; Female = F) and What is your Major (Accountancy = A; Computer Information Systems = C; Marketing = M) .Which of the Following is the best for presenting the data?

SCENARIO 2-5 The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. -Referring to Scenario 2-5, if 100 calls were randomly sampled, _______ of them would have Lasted at least 15 minutes but less than 20 minutes

In constructing a polygon, each class grouping is represented by its _______ and then these are consecutively connected to one another.

To evaluate two categorical variables at the same time, a _______ could be developed.

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14, construct a table of total percentages.

SCENARIO 2-18 The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction. -True or False: Referring to Scenario 2-18, if a student is randomly selected, his/her most likely level of satisfaction will be in the 70s among the 40s, 50s, 60s, 70s, 80s and 90s.

True or False: One of the advantages of a pie chart is that it clearly shows that the total of all the categories of the pie adds to 100%.

Data on 1,500 students' height were collected at a larger university in the East Coast.Which of The following is the best chart for presenting the information?

When studying the simultaneous responses to two categorical questions, you should set up a

True or False: The larger the number of observations in a numerical data set, the larger the number of class intervals needed for a grouped frequency distribution.

SCENARIO 2-4 A survey was conducted to determine how people rated the quality of programming available on television.Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality) .The stem-and-leaf display of the data is shown below. -Referring to Scenario 2-4, what percentage of the respondents rated overall television quality With a rating from 50 through 75?

The width of each class grouping or interval in a frequency distribution should be ________.

True or False: In general, grouped frequency distributions should have between 5 and 15 class intervals.

True or False: Histograms are used for numerical data while bar charts are suitable for categorical data.

True or False: The percentage distribution cannot be constructed from the frequency distribution directly.

SCENARIO 2-13 Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with leaves in 10ths of gallons)in a day by 25 drive-through car wash operations in Phoenix. 2-36 Organizing and Visualizing Variables -Referring to Scenario 2-13, construct a cumulative percentage polygon for the detergent data if the corresponding frequency distribution uses "9.0 but less than 10.0" as the first class.

SCENARIO 2-7 -Referring to Scenario 2-7, the civil suit with the fourth shortest waiting time between when the suit was filed and when it was adjudicated had a wait of ________ months.