Meditation App

For the following questions use this research description:

Psychologists are interested in testing whether a new meditation app can lower people's stress levels. Previous research shows that the average stress level in the general population is a score of 5 (on a 1-10 scale) with a standard deviation of 1. A particular individual, who has been using the meditation app for a month, reports a stress level of 3.

What are the experimental and null hypotheses?

What is the comparison distribution? What are its parameters?

What alpha and Z-threshold will you use?

Calculate the test statistic (show all your work)

Should we fail to reject or reject the null hypothesis?