Thursday

January 29, 2015

January 29, 2015

Posted by **Amy** on Wednesday, April 4, 2012 at 4:38pm.

- Statistics -
**MathGuru**, Wednesday, April 4, 2012 at 8:19pmTry a one-sample z-test.

Hypotheses:

Ho: µ = 40 -->null hypothesis

Ha: µ > 40 -->alternate hypothesis

z = (sample mean - population mean)/(standard deviation divided by the square root of the sample size)

With your data:

z = (43.5 - 40)/(8/√100) = ?

Finish the calculation.

Check a z-table at level 0.05 for a one-tailed test.

If the z-test statistic exceeds that value from the z-table, reject the null and conclude µ > 40. If the z-test statistic does not exceed the that value from the z-table, do not reject the null (you cannot conclude a difference).

I hope this will help get you started.

**Answer this Question**

**Related Questions**

Statistics - A study in Orlando, Florida claimed that the mean commute time for ...

statistics - A study in Orlando, Florida claimed that the mean commute time for ...

Statistics - 18 workers at a large assembly plant were asked the time it took to...

statistics - The average one-way commute time for a random sample of 256 area ...

statistics - According to the Census Bureau's 2002 American Community Survey, ...

statistics - According to the Census Bureau's 2002 American Community Survey, ...

AP Stats (math) - A large metropolitan area found that the time it takes for ...

Statistics - A local eat-in pizza restaurant wants to investigate the ...

statistics - The average commute time via train from the chicago O'Hare Airport ...

statistics - 18 workers at a large assembly plant were asked the time it took to...