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Exam 4: Describing Data: Displaying and Exploring Data

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Question 1

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What chart or graph uses several rows of data to show a frequency distribution? _______________

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Stem-and-l...

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Question 2

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The test scores for a class of 147 students are computed. What is the location of the test score associated with the third quartile?

A) 111
B) 37
C) 74
D) 75%

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Question 3

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Quartiles divide a distribution into ten equal parts.

Percentiles divide a distribution into one hundred equal parts.

The following graph is a

A large oil company is studying the number of gallons of gasoline purchased per customer at self-service pumps. The mean number of gallons is 10.0 with a standard deviation of 3.0 gallons. The median is 10.75 gallons. What is the Pearson's coefficient of skewness?

If a distribution is negatively skewed, the distribution is not symmetrical and the long tail is to the left.

The coefficient of skewness is

A dot plot shows the

If a student places in the 99^th percentile on an exam, she performed better than 99% of all students who completed the exam. Her performance is similar to a statement based on a

A relationship between two nominal variables is summarized by a contingency table.

For the following data, what relationship is shown in the graph?

In a symmetric distribution, is the 99^th percentile located in the right or left tail? _______________

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours. What is the first quartile for the distribution of number of sales per hour? ________________

The following is an example of ____________________________

In a stem-and-leaf display, the leaf represents the members of a class in a frequency distribution.

The interquartile range is graphically presented in a

The coefficient of skewness is a measure of ____________ symmetry.

Draw a negatively or positively skewed distribution and show the relative locations of the mean, median, and mode.

A dot plot is useful for showing the range of the data.