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Unformatted text preview: 74 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 Pvalues. Example
Use the Traditional Method, Pvalue 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 Pvalue Method Confidence Interval Method Introduction to Statistics page 2 of 2 Hypothesis Testing ...
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 Spring '07
 Stone
 Statistics, Normal Distribution, Standard Deviation, Simple random sample, Confidence Interval Method

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