Statistics I - Old Questions

2. Explain how box-plot is helpful to know the shape of the data distribution. The following data set represents the number of new computer accounts registered during ten consecutive days.

a) Compute the mean, median, quartiles, and sample standard deviation.

b) Check whether there are outliers or not.

c) If outliers are present, then delete the detected outliers and compute the mean, median, quartiles, and sample standard deviation again.

d) Make your conclusion about the effect of outliers on descriptive statistical analysis.