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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what is our formula for standard error?

i attached it cus i couldnt get the line in top of the x

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