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Chapter 2: Q. 74 (page 139)

Student grades on a chemistry exam were:77,78,76,81,86,51,79,82,84,99

a. Construct a stem-and-leaf plot of the data.

b. Are there any potential outliers? If so, which scores are they? Why do you consider them outliers?

Short Answer

Expert verified

a. The stem-and-leaf plot of the data is :

b. In this data collection, there are 51,99outliers.

51is25points lower than the closest exam value, but 99is13points higher. These two scores stand out among the rest of the information. They're the exception rather than the rule.

Step by step solution

01

Given information

Student grades on a chemistry exam were:

77,78,76,81,86,51,79,82,84,99.

02

Explanation of solution

The stem plot is a type of exploratory data analysis used in statistics. Each data value in a stem plot is divided into a stem and a leaf. The first major digit is usually found in the stem, while the last significant digit is usually found in the leaf. For instance, the data value has a stem value of4and a leaf value of 3. We have the following information in the given question: localid="1649090217144" 77,78,76,81,86,51,79,82,84,99.

For the provided data, the stem plot is:

Key:stem"5"leaf"1"51.

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