Posted by **Anonymous** on Monday, September 12, 2011 at 10:48pm.

In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject.

Mean SD

Math 67 9.58

English 78 12.45

One student’s Math score was 70 and the same individual’s English score was 84. On which exam did the student do better?

- statistics -
**MathGuru**, Tuesday, September 13, 2011 at 7:11pm
Use z-scores.

Formula:

z = (x - mean)/sd

For Math:

x = 70

mean = 67

sd = 9.58

For English:

x = 84

mean = 78

sd = 12.45

Find both z-scores, then compare.

- statistics -
**Anonymous**, Sunday, April 8, 2012 at 6:16pm
.3131

- statistics -
**Priscilla**, Sunday, April 10, 2016 at 1:34am
z=(70-67)/9.58

z=0.31

z=(84-78)/12.45

z=0.48

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