A manufacturer of cheese filled ravioli supplies a pizza restaurant chain.Based on data collected from its automatic filling process, the amount of cheese inserted into the ravioli is normally distributed.To make sure that the automatic filling process is on target, quality control inspectors take a sample of 25 ravioli.The correct value of t^* to construct a 98% confidence interval for the true mean amount of cheese filling is ________________________ .

Question

Quizplus · Accepted Answer

The correct value of t* to construct a 98% confidence interval for the true mean amount of cheese filling is 2.492. This is because the sample size is 25, which is less than 30, so we use the t-distribution. The degrees of freedom for the t-distribution is 24 (n-1), and the t-value for a 98% confidence interval with 24 degrees of freedom is 2.492.

A Manufacturer of Cheese Filled Ravioli Supplies a Pizza Restaurant