Before Covid, Jorge knew that it took a family 90 minutes to complete a meal (from walking in the door to paying the check) with a standard deviation of 10 minutes.Jorge wants to know if this has changed.He takes a sample of 25 families and finds the mean time to be 85 minutes.At a five percent level of significance, can Jorge say the mean time has changed?

What is the test statistic (z, t, or F)? What is the value of the test statistic? Can Jorge Say the mean has changed? yes or no, What is the p-value?