Visualization

Question 1

The ____ function converts a vector of approximately normally distributed values into z-scores.

Answer 1

z is scale(x)

Question 2

compute the proportion of observations that are within 2 standard deviations of the mean

Answer 2

mean(abs(z) < 2)

Question 3

cumulative distribution function F(a)

Answer 3

pnorm(a, avg, s)