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When does it mean if you score a 67 on a IQ test?
Below 70 it's considered extremely low. Only 2.2% of the population get that score. Please refer to the suggested link for further information.
What does a positive Z-score mean?
it means that the score is above the mean
Is a negative z score always an indicator that the raw score is below the mean?
Yes.z = (raw score - mean)/standard error.Since the standard error is positive, z < 0 => (raw score - mean) < 0 => raw score < mean.
What does a z score of -4 indicate?
It means that your raw score is four standard deviations below the mean. This will mean different things depending on the context of the question. If you're looking at the probability of a single score occurring in a given distribution (say, a score of 40 in a distribution of scores with a mean of 80 and a std. dev. of 10), then this means that the probability of getting a 40 is very, very low--less than .00002.
What is a low IQ score?
under 80
