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Negative z value means that the raw dat is below the mean, if z value is positive it means that the raw data is above the mean.

Q: What does a negative z value mean?

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A negative z score is a value that is less than the mean value.

The z value corresponding to a number below the mean is Negative.

no, z score can be negative but a probability is a always positive between 0 and 1.

The Z value is negative, but area is always positive.

It means that it is less than the mean.

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z-score of a value=(that value minus the mean)/(standard deviation). So if a value has a negative z-score, then it is below the mean.

A negative z score is a value that is less than the mean value.

The z value corresponding to a number below the mean is Negative.

Yes. If a score is below the mean, the z score will be negative.

Yes.

A negative z-score indicates that the observed value (or statistic) was below the mean. In non-directional tests, a negative z-score is just as likely as a positive one.

Use the context: if the variable should be greater than the mean then z is positive and if less than the mean, it should be negative.

Below the mean

no, z score can be negative but a probability is a always positive between 0 and 1.

Nothing particular, since z is symmetric about zero. Half the time z is negative.

z value looks at standard deviations away from the mean. if its tests scores, a higher positive z value means they are higher away from the mean in a positive direction the opposite is true for a negative z score.

|z - 8| or whichever of (z - 8) and (8 - z) that is non-negative.