# Lesson 5

Calculating Measures of Center and Variability

• Let’s calculate measures of center and measures of variability and know which are most appropriate for the data.

### Problem 1

The data set represents the number of errors on a typing test.

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1. What is the median? Interpret this value in the situation.
2. What is the IQR?

### Problem 2

The data set represents the heights, in centimeters, of ten model bridges made for an engineering competition.

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1. What is the mean?

### Problem 3

Describe the shape of the distribution shown in the dot plot. The dot plot displays the golf scores from a golf tournament.

(From Unit 1, Lesson 4.)

### Problem 4

The dot plot shows the weight, in grams, of several different rocks. Select all the terms that describe the shape of the distribution.

A:

bell-shaped

B:

bimodal

C:

skewed

D:

symmetric

E:

uniform

(From Unit 1, Lesson 4.)

### Problem 5

The dot plot represents the distribution of wages earned during a one-week period by 12 college students.