A local courier service advertises that its average delivery time is less than 6 hours for local deliveries.When testing the two hypotheses, and ,μ stands for _____________.
A)The mean delivery time
B)The standard deviation of the delivery time
C)The number of deliveries that took less than 6 hours
D)The proportion of deliveries that took less than 6 hours

Question

A local courier service advertises that its average delivery time is less than 6 hours for local deliveries.When testing the two hypotheses,  and  ,μ stands for _____________.
A)The mean delivery time 
B)The standard deviation of the delivery time 
C)The number of deliveries that took less than 6 hours 
D)The proportion of deliveries that took less than 6 hours

Quizplus · Accepted Answer

In both hypotheses, μ is referring to the mean delivery time. This is because the hypotheses are testing whether the average delivery time is less than 6 hours. Standard deviation, number of deliveries, and proportion of deliveries are not relevant to these hypotheses.

A Local Courier Service Advertises That Its Average Delivery Time