Score is an old English term meaning a group of twenty, so 2 score and 6 means 46 (20+20+6)
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A z-score requires the mean and standard deviation (or standard error). There is, therefore, not enough information to answer the question.
2 standard deviation's below the mean
1 score=20 year so 6 score = 6 x 20 =120 years
it means that the score is above the mean
Yes.z = (raw score - mean)/standard error.Since the standard error is positive, z < 0 => (raw score - mean) < 0 => raw score < mean.