Calculate the median of each column of this data frame

Reference no: EM131383819

Consider the built-in data frameUSArrests.

(a) Determine the number of rows and columns for this data frame.

(b) Calculate the median of each column of this data frame.

(c) Find the average per capita murder rate (Murder) in regions where the percentage of the population living in urban areas (UrbanPop) exceeds 77%. Compare this with the average per capita murder rate where urban area population is less than 50%.

(d) Construct a new data frame consisting of a random samples of 12 of the records of the USArrestsdata frame, where the records have been sampled without replacement.

Reference no: EM131383819

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