What is the average age of a purchaser of Doritos Salsa Verde? Suppose initial tests indicate that the mean age is 31. Is this figure really correct? To test whether it is, a researcher randomly contacts 24 purchasers of Doritos Salsa Verde, with results shown in the following Excel output. Discuss the output in terms of a hypothesis test to determine whether the mean age is actually 31. Let be .01. Assume that ages of purchasers are normally distributed in the population.

Mean: 28.81 Variance: 50.265 Observations: 24

df: 23 T Stat: -1.52 P (T <=t) one-tail: 0.0716 T Critical one-tail: 2.50 P(T< t) two-tail: 0.1431 t-Critical two-tail: 2.81