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URGENT PLEASE HELP
Mike wants to find the confidence interval for a set of data. He knows the sample size and the sample proportion. Which other piece of information does he need to determine the confidence interval?

A.
the critical value
B.
the number of favorable responses
C.
the standard error of the mean
D.
the standard deviation

Respuesta :

I think the answer is letter C

Using the z-distribution, it is found that the other piece of information that he needs to determine the confidence interval is given by:

A. the critical value.

What is a confidence interval of proportions?

A confidence interval of proportions is given by:

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which:

  • [tex]\pi[/tex] is the sample proportion.
  • z is the critical value.
  • n is the sample size.

The margin of error is given by:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

Which means that he needs the critical value, so option A is correct.

More can be learned about the z-distribution at https://brainly.com/question/25890103

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