Exercise 4 Below are 15 randomly generated numbers from a normal distribution N(,2) i) Draw the quantile-quantile plot (Q-Q plot) of the sample percentiles ~p against the theoretical quantiles QZ(p) of the standard normal. It will be close to a straight line ~p=b+kQZ(p). What is the vertical intercept b and the slope k (approximately)? What does this suggest about and 2 (You may use a calculator or computer program to plot this, but do not use the standard R functions for QQ plot because it uses a different formula than the one in class. ) i) Compute the sample mean x and sample standard deviation s. How do these compare to the b and k you estimated in the previous part