I WILL FAN AND MEDAL
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?
Stacey Warren - Expert brainly.com
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margin of error suggests a confidence interval, but no width has been suggested
if we wanted to be 99% confident that the true population proportion was within a given interval, we would use z=2.576 and use the standard error as a multiplier
the standard error is just a modification of the standard deviation.
in this case: and i dont really understand why, the binomial standard deviation is sqrt(npq) with a mean of np (the mean i get)
pmidpoint±zpqn−−−√margin of error=±xnend points