Question

5) [10 pts] Lumuhsanax scored 3.8 on a visual acuity test. The mean for the visual acuity test was 3.75 and the standard deviation was 0.15. Vamiahaidyfop scored 3.6 on a hearing test. The mean for the hearing test was 3.25 and the standard deviation was 0.60. Whose score was relatively better?

Answer 1

We have to find the z score for each one, the higher one is the better

z score = ( test score - mean)/ std deviation

Lumuhsanax

z = (3.8 - 3.75) / 0.15 = 0.333333

Vamiahaidyfop

z = ( 3.6-3.25) / 0.60 = 0.58333

Vamiahaidyfop's score was relatively better