Ken and his twin sister Katy both took the same psychology test but in different classes.On his psychology test,Ken had a score of 110 in a class with a mean of 100 and a standard deviation of 10,while his twin sister Katy had a score of 118 in a class having a mean of 100 and a standard deviation of 18.Which statement is TRUE?
A)Ken's zscore is higher than Katy's.
B)Katy's zscore is higher than Ken's.
C)Both of their z-scores are the same.
D)A z-score cannot be calculated from the information given.

Question

Ken and his twin sister Katy both took the same psychology test but in different classes.On his psychology test,Ken had a score of 110 in a class with a mean of 100 and a standard deviation of 10,while his twin sister Katy had a score of 118 in a class having a mean of 100 and a standard deviation of 18.Which statement is TRUE?
A)Ken's z­score is higher than Katy's.
B)Katy's z­score is higher than Ken's.
C)Both of their z-scores are the same.
D)A z-score cannot be calculated from the information given.

Quizplus · Accepted Answer

The Answer of Ken and his twin sister Katy both took the same psychology test but in different classes.On his psychology test,Ken had a score of 110 in a class with a mean of 100 and a standard deviation of 10,while his twin sister Katy had a score of 118 in a class having a mean of 100 and a standard deviation of 18.Which statement is TRUE?
A)Ken's z­score is higher than Katy's.
B)Katy's z­score is higher than Ken's.
C)Both of their z-scores are the same.
D)A z-score cannot be calculated from the information given.

Ken and His Twin Sister Katy Both Took the Same