Fon 20 If the variance for a set of data equal 100 and the mean equal 50 then the coefficient of variation equal et ered Select one: ed out of O a. 1.25% g question O b. 80% O c. 12.5% O d. 20% en 19 If the correlation coefficient is equal to -1, then coefficient of determination is: et red Select one: d out of O a. must also be equal to 1. O b. can be any value between -1 to +1. e question O c. must be -1. O d. can be either -1 or +1. 18 If Z has standard normal distribution with mean 0 and standard deviation 1. Find P( 1.42 < Z < 1.50) Select one: out of O a. 0.0110 O b. 0.3521 question O c. 0.9222 O d. 0.9332