Sleep hours and overall happiness level

A researcher wanted to examine the relationship between sleep hours and overall happiness level.
As in the datasheet, the researcher has collected data from 100 participants. Column B shows the
average sleep hours per day of the participants. Column C shows the overall happiness level of the
participants.
Conduct a simple linear regression analysis with the sleep hours as the independent variable and the
overall happiness level as the dependent variable.
1-1. What is the estimated simple linear regression equation? (3 points)
1-2. What is the p-value of the slope in the simple linear regression equation? (3 points)
1-3. Explain the relationship between sleep hours and overall happiness level. (3 points)
(Hint: Your answer should be, “As a person sleeps one more hour, his or her expected overall happiness
level … …”)
1-4. According to the simple linear regression equation in 1-1, what is the estimated level of overall
happiness for a person who sleeps 10 hours per day on average? (3 points)