Wednesday

December 17, 2014

December 17, 2014

Posted by **Mary** on Friday, May 18, 2012 at 5:05pm.

A. (0.14, 0.26)

B. (38, 42)

C. (0.17, 0.23)

D. (0.16, 0.24)

- Statistics -
**MathGuru**, Friday, May 18, 2012 at 7:22pmFormula:

CI95 = p ± (1.96)[√(pq/n)]

...where p = x/n, q = 1 - p, and n = sample size.

Note: ± 1.96 represents 95% confidence interval using a z-table.

For p in your problem: 40/200 = 0.2

For q: 1 - p = 1 - 0.2 = 0.8

n = 200

I let you take it from here to calculate the interval and determine your answer from the selections given.

**Answer this Question**

**Related Questions**

statistics - In a random sample of 112 State College students, 41 students ...

statistics - In a random sample of 112 State College students, 41 students ...

statistics - Use the given confidence level and sample data to find a confidence...

Statistics - You want to know if there's a difference between the proportions ...

Math Statistics - 5. Students in an introductory statistics class were asked to ...

Statistics - suppose a random sample of 360 students is drawn form a population ...

Statistics - Are you annoyed with spam e-mail? Suppose a random sample of 200 ...

STATISTICS - Suppose that, in order to estimate the proportion of students who ...

Statistics - A confidence interval was used to estimate the proportion of ...

Statistics - A confidence interval was used to estimate the proportion of ...