# What is the z-score of sample X, if #n = 100, mu= 61, St. Dev. =43, and E[X] =98#?

The z-score is

The z-score for a sample mean is calculated by the formula

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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.

- How can a t-statistic be used to construct a prediction interval?
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- If the mean of numbers 28, x, 42, 78 and 104 is 62, what is the mean of 48, 62, 98, 124 and x?
- What is the z-score of sample X, if #n = 100, mu= 61, St. Dev. =43, and E[X] =98#?
- If the mean, actual observed values, and standard deviation are multiplied by #2#, does the z-score stay the same?

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