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Chapter 8: Q.8.73 (page 482)

Of 1,050randomly selected adults, 360identified themselves as manual laborers, 280identified themselves as non-manual wage earners, 250identified themselves as midlevel managers, and 160identified themselves as executives. In the survey, 82%of manual laborers preferred trucks, 62%of non-manual wage earners preferred trucks, 54%of mid-level managers preferred trucks, and 26%of executives preferred trucks

The sampling error given in the survey is 卤2%. Explain what the 卤2% means.

Short Answer

Expert verified

The 卤2%means that the actual mean of the sample will vary from 2%above or below

Step by step solution

01

Given information

The total number of adults is 1050

Manual laborers 360

Non-manual wage earners 280

Midlevel managers 250

executives 160

02

Solution

Here sample error means the change in the actual or true mean by 2%above or below the sample mean.

It comes because of the restriction and inadequacy in the random variable in the sample.

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