Question

The weights of cars passing over a bridge have a mean of 3550 lb and a standard deviation of 870 lbs. Assume that the weights of the cars are normally distributed. What is?z-score corresponding to a car that weights 4100 pounds.
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Answer 1

Answer:

z-score is calculated by:

z = (value - mean)/std

  = (4100 - 3550)/870

  = 0.632

=> Option B is correct.

Hope this helps!

:)

Answer 2

Answer:

b. 0.632

Step-by-step explanation:

z = (x - mean)/sd

z = (4100-3550)/870

z = 550/870

z = 0.632183908