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Exam 2: Exploring Data: Frequency Distributions and Graphs

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Question 1

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Under what conditions would you choose to use a histogram rather than a bar graph?

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Use a hist...

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Question 2

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A frequency polygon and a bar graph can be used for the same frequency distribution.

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The distribution not described in the text was the

A positively skewed curve has a thin point directed to the left side of a graph.

Simple frequency distributions have class intervals that cover two or more scores.

A bar graph is used to present the frequencies of a quantitative variable.

A positively skewed curve has a thin point directed to the right side of a graph.

If a set of scores ranged from 50 to 99 and the distribution was negatively skewed, you would expect to find the fewest scores in the interval

Horizontal axis, X-axis, and ordinate are all names for the same line.

Data Set 2-1 A student was interested in the structure of the families in the U.S. He sampled 29 of his 330 classmates and got the following answers to the question, "How many children are there in your family?" 3 , 1 , 2 , 2 , 4 , 2 , 1 , 2 , 2 , 1 , 3 , 2 , 3 , 3 , 4 , 2 , 2 , 1 , 3 , 5 , 1 , 1 , 3 , 5 , 2 , 4 , 7 , 1 , 2 -Referring to Data Set 2-1, the proper frequency distribution is:

Bell-shaped and rectangular distributions are symmetrical.

Suppose a frequency distribution with a range of 0 to 100 was severely positively skewed. The greatest frequency of scores would be clustered near

Among the legendary ranches in North America such as the Dragging y Cattle Ranch and the Four Sixes, some authors include the mythical Stats Bar-X Ranch, which has 100,000 acres. Using the data that follow, construct a graph. Naturally, a bar graph is called for. $\begin{array} { l l l } \text { Stats Bar-X 100,000 } & \text { Dragging y 200,000 } & \text { Four Sixes 300,000 } \\\text { Adams Ranch, 65,000 } & \text { CS Cattle Company 150,000 } & \text { Stuart Ranch 40,000 }\end{array}$

Graphs are used by scientists in the early stages of a project, even before data are collected

Assume you collect data from psychology majors who indicate their favorite class in psychology. Students choose from five classes. What kind of graph should you use to display the data?

Identify the skew of the two distributions below. - $\begin{array} { r r } { X} & f \\\hline5 & 10 \\4 & 8 \\3 & 6 \\2 & 2 \\1 & 1 \\0 & 1\end{array}$

A bar graph is the proper graph for the frequency distribution of Satisfaction With Life Scale scores.

A formal grouped frequency distribution is characterized by

To graph the relationship between years and the number of automobile accidents, use

Describe the distinguishing characteristics of the histogram, line graph, and frequency polygon.