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For z-score calculation, mean and std deviation must be given.

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Q: The z score for 78
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Given the mean of 259 and a standard deviation of 229.1 what is the z-score of the value 78?

(78-259)/229.1= -.79


What is the difference between Z-Test and The Z-score?

The Z-score is just the score. The Z-test uses the Z-score to compare to the critical value. That is then used to establish if the null hypothesis is refused.


What is z score of area 0.75?

what is the z score for 0.75


Calculate the z-score for a test score of 87 if the mean test score is 81.1 and standrd deviation is 11.06?

z score = (test score - mean score)/SD z score = (87-81.1)/11.06z score = 5.9/11.06z score = .533You can use a z-score chart to calculate the probability from there.


Can z score be possible 5?

Yes a Z score can be 5.


What does it mean if the Z score of a test is equal to 0?

If the Z Score of a test is equal to zero then the raw score of the test is equal to the mean. Z Score = (Raw Score - Mean Score) / Standard Deviation


What is the z score that correspond to P18?

Find the Z score that correspond to P25


How do you prove a z-score?

A z-score is a linear transformation. There is nothing to "prove".


Can a negative z score be greater than a positive z score?

Assume the z-score is relative to zero score. In simple terms, assume that we have 0 < z < z0, where z0 is the arbitrary value. Then, a negative z-score can be greater than a positive z-score (yes). How? Determine the probability of P(-2 < z < 0) and P(0 < z < 1). Then, by checking the z-value table, you should get: P(-2 < z < 0) ≈ 0.47725 P(0 < z < 1) ≈ 0.341345


How do you find probabilty of negative z score?

Let z be positive so that -z is the negative z score for which you want the probability. Pr(Z < -z) = Pr(Z > z) = 1 - Pr(Z < z).


What is true if someone has a z score of zero?

Z score of 0 is the mean of the distribution.


What is the value of a 'z' score of 0?

A z-score of 0 means the value is the mean.