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# Calculating sample Size

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A market research agency would like to estimate the proportion of Canadian households owning a personal computer. What minimum sample size will be required if they want to be 99% confident that the sample proportion will not differ from the true population proportion by more than 5%?

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The sample size required for estimating proportion with 99% confidence is calculated

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A market research agency would like to estimate the proportion of Canadian households owning a personal computer. What minimum sample size will be required if they want to be 99% confident that the sample proportion will not differ from the true population proportion by more than 5%?

This is a two tailed test since we are testing whether sample proportion will not differ from the true population proportion

&#963;p=standard error of proportion=&#8730;(pq/n)
The maximum value of standard error of proportion for any given value of n is when p=q=0.5

confidence ...

##### 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.