Help please? Suppose you have a normally distributed set of data pertaining to a standardized test. The mean score is 500 and th
e standard deviation is 100. What is the z-score of 450 point score? 1.5 1 0.5 -0.5
1 answer:
The formula to calculate the z-score of a certain value is:
z = (x - (mean))/(standard deviation)
In this example, the x-value is 450, the S.D. is 100, and the mean is 500.
So, substitute these values into the formula.
z = (450-(500))/100
z=-50/100
z=-0.5
Therefore, the z-score is -0.5.
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