Please help me solve: X has normal dist. w/ mean 3, stnd dev 1.5; find stnd dev of Y = 3x + 5

[Robin ankith]

If X has a normal distribution of mean = 3 and std deviation = 1.5, what will be the std dev of Y=3x+5

 

[Harry_the_cat]

Var(aX + b) = a² Var(X )
That should help you find the variance and then the standard deviation of Y = 3X + 5.