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OpenStudy (anonymous):
Help Please!
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OpenStudy (anonymous):
The scores on a standardized test are normally distributed with a mean of 500 and a standard deviation of 100. Suppose 6000 students took the test. Approximately how many students scored above 490?
OpenStudy (anonymous):
A. 5048 B. 3239 C. 2761 D. 952
alones (alones):
hey approximately it's b
OpenStudy (anonymous):
why?
alones (alones):
well cuz from the area under the curve right of -0.10 from is .5398. So u should expect .5398(6000)=3,239 and it's about 490
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OpenStudy (anonymous):
ok
alones (alones):
yep
OpenStudy (anonymous):
can you help me in another one?
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