Answer the following questions pleaseSolution5 Reject the nu

Answer the following questions please

Solution

5) Reject the null hypothesis that chocolate has no effect on mood as 0 is not in the confidence interval.

6)

Confidence Interval:

±0.14

Range for the true population mean:

4.16 to 4.44

Hence option 4 is right

9) Negative skewed distribution very much affect normality