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Exam 4: Describing Data: Displaying and Exploring Data

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Question 31

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The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc. 11| 1 5 9 12| 0 1 2 2 6 9 13| 0 1 2 3 4 5 5 7 8 8 9 14| 2 6 8 15| 0 1 2 4 5 7 8 9 16| 1 5 7 9 What is the median value?

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138 boats shipped in a week
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Question 32

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

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Question 33

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Pearson's coefficient of skewness (Sk) ranges from -3.0 to +3.0. It is computed by subtracting the median from the mean, multiplying the result by 3, and dividing by the _______________.

A sample of the homes currently offered for sale revealed that the mean asking price is $75,900, the median is $70,100, and the modal price is $67,200. The standard deviation of the distribution is $5,900. What is Pearson's coefficient of skewness in this sample?

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

Quartiles divide a distribution into ___________.

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc. 11| 1 5 9 12| 0 1 2 2 6 9 13| 0 1 2 3 4 5 5 7 8 8 9 14| 2 6 8 15| 0 1 2 4 5 7 8 9 16| 1 5 7 9 How many observations are in the third class?

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 __________.

Quartiles divide a frequency distribution into _______ equal parts.

A stem-and-leaf display includes the following row: 5 | 10 11 31 52 79 98. Assume that the data is rounded to the nearest whole number.

Pearson's coefficient of skewness is a measure of a distribution's symmetry.

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

The range of the coefficient of skewness is ____________.

A dot plot is best applied when _____________________.

For the following data, what is the interquartile range?

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

What is the difference between a scatter diagram and a contingency table?

A __________ shows the interquartile range.

What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17, a median of 12, and a standard deviation of 6?

The following is an example of a ___________________________.