SOLUTION: A normal distribution has a mean of 50 and a standard deviation of 5. P(43≤x≤57) z-score: ?

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Question 1156729: A normal distribution has a mean of 50 and a standard deviation of 5.
P(43≤x≤57)
z-score: ?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
(43-50)/5=-1.4
(57-50)/5=+1.4
it is [-1.4, 1.4]