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anonymous
 one year ago
A random sample of 100 undergraduate students at a university found that 78 of them had used the university library’s website to find resources for a class. What is the margin of error for the true proportion of all undergraduates who had used the library’s website to find resources for a class?
0.04
0.08
0.1
0.12
anonymous
 one year ago
A random sample of 100 undergraduate students at a university found that 78 of them had used the university library’s website to find resources for a class. What is the margin of error for the true proportion of all undergraduates who had used the library’s website to find resources for a class? 0.04 0.08 0.1 0.12

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amistre64
 one year ago
Best ResponseYou've already chosen the best response.1margin of error is not the same as 'the standard error'. this question does not contain all the information needed for a 'margin of error' calculation since it does not provide for a confidence level. so, it most likely is asking for the standard error instead

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1what is our formula for standard error?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i attached it cus i couldnt get the line in top of the x

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1thats a good start, now, we simply need to define s what can you tell me of the standard deviation of a proportion? any ideas?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0not really i dont know how to do standard deviation

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1also, lets go this route: include the s inside of the sqrt \[\frac{s}{\sqrt{n}}\implies \sqrt{\frac{s^2}{n}}\] well, for lack of a better way to express it \[s^2 = \frac xn \frac{nx}{n}\]

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1therefore: \[SE=\sqrt{\frac{x(nx)}{n^3}}\] or letting p = x/n, and q+p = 1 \[SE=\sqrt{\frac{pq}{n}}\]

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1what is 78(10078)/100^3 ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is it going to be a decimal?
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