Statistics 7.4 - 7-4 Testing a Claim about a Mean: Known...

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Unformatted text preview: 7-4 Testing a Claim about a Mean: Known Assumptions 1. The sample is a simple random sample. 2. The population standard deviation, , is known. 3. Either or both of these conditions is satisfied: The population is normally distributed or n > 30 . Test Statistic for Testing a Claim about a Mean with known z= x - / n Use the standard normal distribution to calculate critical values and P-values. Example Use the Traditional Method, P-value Method and Confidence Interval Method to perform the Hypothesis Test for the following claim: We are given a simple random sample of 106 body temperatures having a mean of 98.2 F. Assume that the population standard deviation, , is known to be 0.62 F. Use a 0.05 significance level to test the common belief that the mean body temperature of healthy adults is equal to 98.6 F. Traditional Method Introduction to Statistics page 1 of 2 Hypothesis Testing P-value Method Confidence Interval Method Introduction to Statistics page 2 of 2 Hypothesis Testing ...
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This note was uploaded on 04/08/2008 for the course MAT 143 taught by Professor Stone during the Spring '07 term at North Shore Community College.

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Statistics 7.4 - 7-4 Testing a Claim about a Mean: Known...

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