Concept explainers
(a)
To Draw:TheStem-and-leaf plot of the data.
(a)
Answer to Problem 15PPS
Explanation of Solution
Given:In the problem you will use the stem-and-leaf plot to analyze the data. The test scores
Display the data in stem-and-leaf plot.
The stem-and-leaf plot of the data is shown below:
(b)
To Find: The mean, median, and mode of the data.
(b)
Answer to Problem 15PPS
Mean=
Median=
The mode of the data is 59 and
Explanation of Solution
Given: In the problem you will use the stem-and-leaf plot to analyze the data. The test scores
Finding Mean:
Mean=
Finding Median:
The number of observations is even
Then
Median
Median=
Finding Mode:
The mode of the data is 59 and
(c)
To Draw: The graph from Stem-and-leaf plot of the data.
(c)
Answer to Problem 15PPS
Explanation of Solution
Given: In the problem you will use the stem-and-leaf plot to analyze the data. The test scores
Turn the stem-and-leaf plot to
The graph of the stem-and-leaf plot of the data is shown below:
(d)
To Describe: The data of the number of peaks in the graph.
(d)
Answer to Problem 15PPS
The graph is not symmetric
The graph has the two peaks that are marked at the range of
Explanation of Solution
Given: In the problem you will use the stem-and-leaf plot to analyze the data. The test scores
Describe the data by the number of peaks in the graph. Is it symmetric? Explain.
The graph has the two peaks that are marked at the range of
The graph is not symmetric
(e)
To Describe: The data is skewed or not.
(e)
Answer to Problem 15PPS
The data set is skewed
Explanation of Solution
Given: In the problem you will use the stem-and-leaf plot to analyze the data. The test scores
A set of data can be described as being skewed if the graph of the data is not symmetric. Is the data is skewed? Explain.
Since the data is not symmetric
The data set is skewed.
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Pre-Algebra, Student Edition
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