Solved: A sample of 20 glass bottles of a particular type

Chapter 1, Problem 57E

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QUESTION:

Problem 57E

A sample of 20 glass bottles of a particular type was selected, and the internal pressure strength of each bottle was determined. Consider the following partial sample information:

a. Are there any outliers in the sample? Any extreme outliers?

b. Construct a boxplot that shows outliers, and comment on any interesting features.

Questions & Answers

QUESTION:

Problem 57E

A sample of 20 glass bottles of a particular type was selected, and the internal pressure strength of each bottle was determined. Consider the following partial sample information:

a. Are there any outliers in the sample? Any extreme outliers?

b. Construct a boxplot that shows outliers, and comment on any interesting features.

ANSWER:

Solution:

Step 1 of 3:

We have

Median = 202.2, lower quartile() = 196.0, and Upper quartile () = 216.8

We have the first three and last three observations.

125.8, 188.1, 193.7, 221.3, 230.5, and 250.2.


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