Answer
The graphical summary of the continuous quantitative variable “Cellphone bills” is shown below:
Work Step by Step
A graphical summary of the Cellphone bills is created in Minitab and the steps are as follows:
Step 1: Enter the provided data under columnC1.
Step 2: Go to Stat, select basic statistics, and choose Graphical summary.
Step 3: A new dialog box is created.Put variable “Cellphone bills” under graphical variables. Finally, click ok.
A graphical summary of the provided data shows that the data is positively skewed, that is, the highest values are in the middle and reduce left and right along the sides. The minimum value is 0 and the maximum value is 432.23. The box plot shows that 350, 370.87, and 432.23 are the outliers in the data set.
According to Anderson–Darling Normality test, the p-value0.005 is less than the significance level that is 0.05. So, the null hypothesis gets rejected and it is concluded that the data does not follow a normal distribution.
