In a class test where the mean was 62% and the standard deviation 12.6%, bob received 50%. What is his z-score?

Answer 1

#-0.95#

Z-score is the number of standard deviations away from the mean.
So, Bob received 12% less than the mean.

So how many standard deviations is -12%? It is #(12%)/(12.6%)# or -0.95 standard deviations. Thus the z-score is -0.95.

The formal equation for z-score is

where x is the datapoint, x bar is the mean, and s is the standard deviation.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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