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Chapter 2: Q. 51 (page 134)

Use the following information to answer the next three exercises: State whether the data are symmetrical, skewed to the left, or skewed to the right.

87;87;87;87;87;88;89;89;90;91

Short Answer

Expert verified

The data is skewed to the right.

Step by step solution

01

Given information

The data given is:

87;87;87;87;87;88;89;89;90;91
02

Explanation

The mean can be calculated as:

Mean=87+87+87+87+87+88+89+89+90+9110=88210=88.2

The median is calculated as:

First, we need to sort the data in ascending order as:

87,87,87,87,87,88,89,89,90,91鈭�Median=10+12thitem=5.5thitem=87+0.588-87=87.5

The mode is the most frequently occurring observation and in the given data, we clearly see 87occur four times.

Mode=87

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