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anonymous
 one year ago
Help statistics question!!
anonymous
 one year ago
Help statistics question!!

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jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0Are you referring to np > 5 and n(1p) > 5 ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0I also found this

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0oh N = 10n N = population size n = sample size that sounds familiar in a way

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0sorry N > 10n

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0i found this too http://www2.fiu.edu/~tardanic/size.pdf it says `According to Moore/McCabe, this is true, strictly speaking, as long as the population is at least 100 times larger than the sample.`

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0ok I guess the rule isn't 100% solid

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0I would go with your book since that's what the teacher will use

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0sigma = standard deviation sigma = sqrt(n*p*(1p)) we don't know the value of p, but we do know n and sigma n = 50 sigma = 0.07 are you able to solve for p?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0hmm there may be another way to do this

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0ok I figured out a shorter way

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0\[\Large \sigma = \sqrt{\frac{p*(1p)}{n}}\] \[\Large \sigma = \sqrt{\frac{p*(1p)}{100}}\] \[\Large \sigma = \sqrt{\frac{p*(1p)}{2*50}}\] \[\Large \sigma = \sqrt{\frac{1}{2}}*\sqrt{\frac{p*(1p)}{50}}\] \[\Large \sigma = \sqrt{\frac{1}{2}}*0.07\] \[\Large \sigma \approx 0.0495 \approx 4.95\%\]

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.0The quantity \[\Large \sqrt{\frac{p*(1p)}{50}}\] is the given standard deviation of 7% = 0.07
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