Sunday

March 1, 2015

March 1, 2015

Posted by **Julia Brown** on Friday, June 4, 2010 at 8:36pm.

- Statistics -
**MathGuru**, Sunday, June 6, 2010 at 9:47pmNull hypothesis:

Ho: p = .80 -->meaning: population proportion is equal to .80

Alternate hypothesis:

Ha: p does not equal .80 -->meaning: population proportion does not equal .80

Using a formula for a binomial proportion one-sample z-test with your data included, we have:

z = .77 - .80 / √[(.80)(.20)/400]

Finish the calculation.

Use a z-table to find the p-value.

(The p-value is the actual level of the test statistic.) Determine whether or not to reject the null.

I hope this will help get you started.

**Answer this Question**

**Related Questions**

statistics - Suppose that the amount of time it takes the IRS to refund to ...

AP Statistics - Of all U.S. fourth graders, 71% are assigned mathematics ...

statistics - it has been reported that 40% of all internet users have been ...

statistics - For this problem, assume the balls in the box are numbered 1 ...

math - In surveys about sensitive topics, respondents are sometimes given ways ...

mathematic - In surveys about sensitive topics, respondents are sometimes given ...

no - Two things that are certain in life are death and taxes; we often hear. Do...

Personal Finance - Two things that are certain in life are death and taxes; we ...

Stats - The Internal Revenue Service (IRS) provides a toll-free help line for ...

statitics - E. Coli outbreak. Outbreaks of E. coli have occurred at a rate of 2....