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# Estimation

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"Hockey-r-us," a store specializing in sales of hockey equipment, wants to find out the average age of all its customers. A random sample of 25 customers reveals an average age of 38 years with a standard deviation of six years. It determines a 95% confidence interval of the average age of all customers.

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An Estimation scenario is solved.

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Step 1. In order to answer this problem you will first have to calculate the standard error the mean, knowing that N (the number of subjects)= 25, the mean=38, and the &#963; (standard deviation) = 6.
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<br>The formula for the ...

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.