Applied Statistics and Probability for Engineers
Applied Statistics and Probability for Engineers
6th Edition
ISBN: 9781118539712
Author: Douglas C. Montgomery
Publisher: WILEY
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Chapter 6, Problem 103SE
To determine

Construct a stem-and-leaf plot of these data and interpret.

Construct a time series plot of these data and interpret.

Expert Solution & Answer
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Answer to Problem 103SE

The stem-and-leaf plot of these data is shown below,

Applied Statistics and Probability for Engineers, Chapter 6, Problem 103SE , additional homework tip  1

The a time series plot for these data is shown below,

Applied Statistics and Probability for Engineers, Chapter 6, Problem 103SE , additional homework tip  2

Explanation of Solution

Calculation:

The given information is that, the data represent the monthly absolute estimates of global (land and ocean combined) temperature index (degrees C) from 2000.

Stem-and-leaf plot:

Software procedure:

Step-by-step procedure to obtain stem-and-leaf plot using MINITAB software is as follows:

  • Select Graph>Stem and leaf.
  • Select Global Temperature in Graph variables.
  • Click OK.

Times series plot:

Software procedure:

Step-by-step procedure to obtain time series plot using MINITAB software is as follows:

  • Select Graph>Time series plots.
  • Choose Multiple.
  • In Series select the column Petroleum Imports, Petroleum Imports as percent and Petroleum Imports from Persian.
  • Click OK.

Interpretation:

From the stem plot, it is observed that the values are arranged form lowest values to highest values.

From the time series plot it observed that there is an upward trend and a downward trend simultaneously.

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Chapter 6 Solutions

Applied Statistics and Probability for Engineers

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