Is the average body temperature actually less than 98.6 degrees Fahrenheit for h

Question

Is the average body temperature actually less than 98.6 degrees Fahrenheit for healthy human adults? A sample of 21 healthy human adults was taken. Avg: 98.39

Name of Test: One-Sample z-methods One-Sample t-methods # of populations: 1) quantitative var. of interest 2) one population 3) known 1) quantitative var. of interest 2) one population 3) unknown When used Conditions 1) sample representative of pop. 2) observations independent 3) distribution of sample means 1) sample representative of pop. 2) observations independent 3) distribution of sample means is normal is normal Hypothesis: Does the sample of n subjects come from Does the sample of n subjects come from a population with a population with some specified value some specified value Ho : ,-Ho Test-statistic Distribution of test-statistic: normal t-distribution with (n-1) df - Confidence Interval: ±

Explanation / Answer

When a sample mean is compare with a given value, we use the one sample t-test.

If the sample size is large or more than 30 we can also use Z-test because in large sample t-test and Z test are approximately equal.

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