Concept explainers
To find: The situation in which the construction of confidence interval is not safe
Answer to Problem 3PT
When the stem-plot contains outliers.
Explanation of Solution
Given:
Sampling is sampling random.
To construct the confidence interval either the sample size should be 30 or more or the population must be distributed normal which means that it should not contain the extreme values.
In this case, it would not be possible to construct the confidence interval using the stem-plot that contains the outliers.
Hence, the correct option is (c).
Chapter 8 Solutions
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