Question: In a certain bank branch, we collected the average service time (in minutes) from a sample with 50 customers regarding three types of services. The

In a certain bank branch, we collected the average service time (in minutes) from a sample with 50 customers regarding three types of services. The data can be found in files Services.xls, Services.sav, and Services.dta. Compare the results of the services based on the following measures:

a) Measures of position (mean, median, and mode).

b) Measures of dispersion (variance, standard deviation, and standard error).

c) First and third quartiles; check if there are any outliers.

d) Fisher’s coefficient of skewness (g1) and Fisher’s coefficient of kurtosis (g2). Classify the symmetry and the flatness level of each distribution.

e) For each one of the variables, construct a bar chart, a boxplot, and a histogram.

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