SOLUTION: Suppose the obtained z was -2.5

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Question 875684: Suppose the obtained z was -2.5
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Re TY: .0062 < .05 (popular 5% confidence Interval) reject.
z = -2.5, P(z < -2.5) = .0062 0r .62% of the Area under the normal curve is left of z = -2.5
Below: z = 0, z = ± 1, z= ±2 , z= ±3 are plotted.
Note: z = 0 (x value: the mean) 50% of the area under the curve is to the left and %50 to the right