a set of maths exame score mean is 70 and variance is 8. a set of english score has mean is 74 and variance is 16. for which exame whould a score of x=78 have a higher standing?

Question

a set of maths exame score mean is 70 and  variance is  8. a set of english score has mean is 74 and variance is 16. for which exame whould a score of x=78 have a higher standing?

PsyDAG · Answer

Standard deviation (SD) = square root of variance Z = (score-mean)/SD Whichever Z score is the highest.