Question 334830
standardize both test 

let {{{Z[v]}}}=standardized verbal test score =(score-average)/(std dev)
let {{{Z[q]}}}=standardized quantitative test score =(score-average)/(std de
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{{{Z[v]}}}=(81-50)/20=1.55
{{{Z[q]}}}=(6.4-0)/5=1.28
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since  {{{Z[v]>Z[q]}}} then the verbal is the stronger ability
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explanation:  Since each type of test comes from distribution of different averages and different variations (or consistencies), it is unclear by just looking at the scores the stronger ability.  By standardizing both location and consistency, the scores are put on equal footing or similar conditions, thus making comparisons easier
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The standardized score represents the number of standard deviations from the mean, so the standardized score for the verbal is further from the mean, after adjusting for the variation than the quantitative score, thus it is the stronger ability based on this standardized score.