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GMATPREP - PS problem -1
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vishal_2804
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One Standard Deviation is 6 hours
Mean is 21.
1 Standard Deviation below Mean: 21- 6= 15 hours
2 Standard Deviations below Mean: 21- (2*6)= 21 - (12) = 9 hours
Pat watched television between 1 and 2 SD'd below mean.
SO answer must fall between 9 and 15 hours
Answer: D- 12 hours
Mean is 21.
1 Standard Deviation below Mean: 21- 6= 15 hours
2 Standard Deviations below Mean: 21- (2*6)= 21 - (12) = 9 hours
Pat watched television between 1 and 2 SD'd below mean.
SO answer must fall between 9 and 15 hours
Answer: D- 12 hours
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karanrulz4ever
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1 std deviation below the mean : 21-6 = 15
2 std deviation below the mean : 21-2(6) = 9
answer can be anything between 9 and 15. Out of the choices only 12 applies.
2 std deviation below the mean : 21-2(6) = 9
answer can be anything between 9 and 15. Out of the choices only 12 applies.
