QUESTION 1) Use the dataset: WDI_2250.RData 1) Present descriptive statistics for the GDPpc variable (min, max, median, mean, 25th and 75th percentile) and describe each statistic in full sentences. Identify which are the countries with the lowest and highest GDPpc.

2) Present a histogram of the GDPpc variable, and comment on the shape of the distribution.

3) Calculate a 95 % confidence interval around the mean of the GDPpc variable (sample), and interpret the interval estimates in full sentences. Showmanual calculation and the associated confidence interval formulas!