chi-square test for variance

Solved (Free): A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is greater than 450

A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea…

Solved (Free): In a pulse rate research, a simple random sample of 400 men results in a mean of 80 beats per minute

In a pulse rate research, a simple random sample of 400 men results in a mean of 80 beats per…

Solved (Free): Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes

Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes.…

Solved: A soft-drink dispensing machine is said to be out of control if the variance of the contents exceeds 1.5 dl. If a random sample

A soft-drink dispensing machine is said to be out of control if the variance of the contents exceeds 1.5 dl.…