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Exam 4: Describing Data: Displaying and Exploring Data

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Question 1

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Quartiles divide a distribution into ___________.

A) 2 equal parts
B) 4 equal parts
C) 10 equal parts
D) 100 equal parts

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Question 2

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Percentiles divide a distribution into 100 equal parts.

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Question 3

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

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

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

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

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

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

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?

The following graph is a ____________.

The following graph is a ___________.

The interquartile range is graphically presented in a ___________.

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

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

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

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

A dot plot is best applied when _____________________.

A ___________ uses dots to show frequencies.

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