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A random sample of size n is to be drawn from a population…

A random sample of size...
A random sample of size n is to be drawn from a population with µ=500 and sd=100. The sample size that would be necessary to ensure a standard error of 25 is n= ....... . (This is based on the formula for calculating the standard error. Remember that sample size is always rounded to the next whole number.)
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7/6/2010
abozer
Category: Math Homework
Satisfied Customers: 6,159
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Hi,

SE = sd/sqrt(n)

25 = 100/sqrt(n)

25 sqrt(n) = 100

sqrt(n) = 4

n = 16
abozer
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Customer reply replied 8 years ago
Can you tell me what sqrt means? Thanks.
I used it to represent square root sign.
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Customer reply replied 8 years ago
Thank you!
You're Welcome.
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