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When calculating the 99% confidence interval for a sample of 15 patients, what constant is used...

When calculating the 99% confidence interval for a sample of 15 patients, what constant is used in the formula?

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Expert Solution

We have given confidence interval level is 99% and sample of 15 patients means n= 15

If sample values given and standard deviation is not know then we use t table

Df= degrees of freedom = n-1 = 15-1 = 14

Confidence level = C = 0.99 or 99%

tc= 2.977     (we check the d.f = 14 and C = 0.99)

When sample data is not given we have population standard deviation then we use Z table instead of t and value is

2.58 for 99%

orchestra answered 1 year ago
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