Suppose that you wish to test a claim about a population mean. Which distribution should be used given that the sample is a voluntary response sample, $\sigma$ is unknown, n = 15, and the population is normally distributed?
A) Neither the normal nor the t-distribution
B) t-distribution
C) Normal distribution

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The Answer of Suppose that you wish to test a claim about a population mean. Which distribution should be used given that the sample is a voluntary response sample, $\sigma$ is unknown, n = 15, and the population is normally distributed?
A) Neither the normal nor the t-distribution
B) t-distribution
C) Normal distribution

Suppose That You Wish to Test a Claim About a Population