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Exam 2: Describing Data: Frequency Distributions and Graphic Presentation

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Question 31

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For a stem-and-leaf display, the stem for the value 67 is_____ .

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Question 32

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(i) A frequency distribution is grouping of data into classes showing the number of observations in each class. (ii) The midpoint of a class, which is also called a class mark, is halfway between the lower and upper limits. (iii) A class interval, which is the width of a class, can be determined by subtracting the lower limit of a class from the lower limit of the next higher class.

A) (i) , (ii) and (iii) are all correct statements.
B) (i) and, (ii) are correct statements but not (iii) .
C) (i) and, (iii) are correct statements but not (ii) .
D) (ii) and, (iii) are correct statements but not (i) .
E) All statements are false.

F) A) and D)
G) B) and E)

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Question 33

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What is the following table called?

Consider the following stem and leaf plot: Suppose that you decided to develop a frequency distribution from this plot. What would be the lower limit of the first class?

Which of the following would be most helpful if you wished to construct a pie chart?

Refer to the following price of jeans are recorded to the nearest dollar: The first two class midpoints are $62.50 and $65.50. What is the class interval?

The Lake Ontario Credit Union selected a sample of 40 student chequing accounts. Below is a chart of their end-of-the-month balances. The bank considers any student with an ending balance of $400 or more a "preferred customer". Estimate the number of preferred customers in this sample.

Refer to the following cumulative frequency distribution on days absent during a calendar year by employees of a manufacturing company: -How many employees were absent six or more days?

A group of 100 students were surveyed about their interest in a new International Studies program. The survey asked students about their interest in the program in terms of high, medium, or low. 30 students responded high interest; 50 students responded medium interest; 40 students responded low interest. What is the relative frequency of students with high interest?

-Students under the age of 26 account for approximately what proportion of Business students across the province?

Refer to the following cumulative frequency distribution on days absent during a calendar year by employees of a manufacturing company: -What is the class midpoint of the highest class?

The best means to display data that is based on a trend over a period of time is the__________ .

Statistics Canada report 2010 results in the following chart. Is the data quantitative or qualitative? What is the name of the table shown?

What is the class midpoint for the $45 up to $55 class?

The chart below shows the Gross Domestic Product for 7 nations. Which of the following statements can be determined from this chart?

The suggested class interval based on number of observations given the data ranges from 100 to 200 with 50 observations is_____ .

A sample distribution of hourly earnings in Paul's Cookie Factory is: The limits of the class with the smallest frequency are:

The age distribution of a sample of the part-time employees at Lloyd's Fast Food Emporium is: What type of chart has the data been organized to draw?

For the following distribution of heights, what are the limits for the class with the greatest frequency?

Refer to the following chart showing a distribution of exporting firms: -For the distribution above, what is the midpoint of the class with the greatest frequency?