11 A large college class is graded on a total points system. The total points g

Question

11 A large college class is graded on a total points system. The total points g in s semester by the students in the class vary normally with a mesta of 6Ts standard deviation of 50. Another large class in a different department is on a to 100 scale. The final grades in that class follow tormal distributio 0 of 6, Jessica earns T29 points sn a mean of 82 and a standard deviation student did better clans, while Ans scores 90 in the second class. Which (a) Jessica did better her score is s4 points above the mean wh is only 8 points above the mean (b) Ana did better because her seore is 1.3 standard above essica's is only 1.08 standard deviations above the nean 0 3 2 5 0 8: 3 8: 17 did equally well because both scored above the Letter, they cannot be

Explanation / Answer

Answer-C

Jessica Z score=(729-675)/50=1.08

Anna Z score=(90-82)/6=1.33

z score (or number of standard deviations above the mean) is relevant;number of points above the mean is irrelevant so Ans-C

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