Normal Distribution of Data (Graphical)

There are few ways to check the normality of data before we could do a hypothesis test on the data collected

Firstly, I am going to check the data based on graphical method; Histogram

The steps taken are;

The result and interpretation;

For the variable AverageSA, the normal curve on the histogram shows that the data is slightly negatively skewed with Mean = 91.12 and SD = 16.378.