Answer to the following questions, using the appropriate tables. a) Find z such that P(Z>21)=0.1762 with Z is a standard normal distribution. b) For a chi-square distribution, find xã such that P(x? > xà)=0.025, when v= 12 degrees of freedom. c) For at distribution, find P( T > 1.746), when v = 16 degrees of freedom.
