Overview
2
2
3
1 point
?
It is known for a certain town in Pennsylvania that residents take an average of 6.2 sick days from work each year with a standard deviation of 1.2.
A researcher believes that a newly introduced healthcare system has decreased the standard deviation. To test this theory, the researcher collects data from 20 families and finds a standard deviation of 0.8. Use the x? -table to find the largest value that the corresponding P-value can be.
Type your answer..
3
1 point
The owner of a local restaurant believes that a implementing a certain change to the ordering process will result in a change in the standard
deviation of wait time. The current wait time is o = 4.7 minutes. To test their theory, the owner implements the change and collects data from 29
customers and find a sample standard deviation of s=3.7. Find the largest value that the corresponding P-value can be.