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Exam 4: Describing Data: Displaying and Exploring Data

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Question 1

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The interquartile range is graphically presented in a ___________.

A) Dot plot
B) Stem-and-leaf display
C) Box plot
D) Contingency table

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Question 2

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A dot plot is best applied when _____________________.

A) The mean, median, and mode are equal
B) The general shape of a distribution is symmetric
C) The relationship between two variables is summarized
D) A single variable is summarized

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Question 3

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The types of variables called _______________ are summarized in a contingency table.

In the following set of data: what are the first, second, and third quartiles?

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 Pearson's coefficient of skewness in this instance?

A contingency table would be used to summarize data such as ________.

The _____________ unit of measurement is used to express the coefficient of skewness.

Quartiles divide a distribution into ___________.

A ___________ uses dots to show frequencies.

A dot plot is an easy way to represent the relationship between two variables.

Community Hospital collected data on the length of time that patients stayed in the intensive care ward. The mean time was 28 days, the median 25 days, and the modal time 23 days. The standard deviation was computed to be 4.2 days. What is Pearson's coefficient of skewness in this instance?

The following graph is a ___________.

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

The 50^th percentile of a distribution is the same as the distribution mean.

The coefficient of skewness measures a distribution's ____________ symmetry.

Percentiles divide a distribution into 100 equal parts.

For the following data, find the information required to construct a box plot.

Using the following statistics to describe a distribution of data, what is the interquartile range? Minimum = 10 Q1 = 25 Median = 50 Q3 = 75 Maximum = 95

What is the common purpose of a scatter diagram and a contingency table?

The following graph is a ____________.