To find confidence intervals for the mean of a normaldistribution the t distribu

To find confidence intervals for the mean of a normaldistribution the t distribution is usually used in practicalapplications instead of the standard normal distributionbecauseA. the mean of the population is not knownB. the t distribution is more effectiveC. the variance of the population is usually notknownD. the sample size is not knownConstruct confidence intervals for a mean. Question: To findconfidence intervals for the mean of a normal distribution the tdistribution is usually used in practical applications instead ofthe standard normal distribution because Answer Rationale: Inconfidence interval applications the sample size is known. Inaddition in statistical applications where both the t distributionand the standard normal distribution are used both the mean andvariance of the population are usually unknown.