Suppose we are interested in the population mean of a normally distributed population with unknown standard deviation.If we take a sample of 12 observations from this population,the confidence interval for the population mean is computed based on the t distribution.

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Quizplus · Accepted Answer

This is because when the population standard deviation is unknown and we have a sample size of less than 30, we use the t-distribution to calculate the confidence interval for the population mean. Therefore, in this case, we would use the t-distribution to compute the confidence interval for the population mean based on the sample of 12 observations.

Suppose We Are Interested in the Population Mean of a Normally