Question 1b: Psychiatric standards for a certain panic disorder state that people who have more than μ = 3 panic attacks in a six month period qualify for a diagnosis of severe panic disorder. People with fewer than 2 panic attacks in this period would not meet the criteria for this particular diagnosis. Researchers hypothesize that work in high stress jobs may affect the incidence of panic attacks. They collect a sample of n = 41 employees from high stress jobs and find that on average this sample had x̅ = 3.8 panic attacks in the last six months, with a sample variance of S-squared = 9. 

Determine the appropriate t test to use, with alpha at .05 and determine whether there is evidence that workers in high stress jobs are experiencing significantly more or less panic attacks than the clinical standard given for severe panic disorder.

1.Report sample value:

2.Report T critical value(s):

3.Write a one sentence conclusion of your test:

4.Find the upper and lower values of the 95% confidence interval around the sample: