Friday

October 24, 2014

October 24, 2014

Posted by **Michelle** on Monday, December 7, 2009 at 8:30pm.

a. State the null and alternate hypotheses.

Ho:

H1:

b. State the decision rule.

c. Compute the value of the test statistic.

d. Compute the p-value.

e. What is your decision regarding the null hypothesis? Interpret the result.

- college Math -
**MathGuru**, Thursday, December 10, 2009 at 7:17pmHo: µ = 40 --->meaning the population mean is equal to 40.

H1: µ < 40 ---> meaning the population mean is less than 40.

This will be a one-tailed test because the alternative hypothesis is showing a specific direction.

Use a z-test. Find the significance level for a one-tailed test using a z-table. Compare the test statistic from the z-test to the value from the z-table. If the test statistic exceeds the value in the table, then reject the null and conclude µ < 40. The p-value is the actual level of the test statistic found using a z-table.

Here is a z-test formula to get you started:

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

Sample mean = 39

Population mean = 40

Standard deviation = 5

Sample size = 100

Fill the values into the formula and compute the test statistic.

I'll let you take it from here.

I hope this will help get you started.

**Answer this Question**

**Related Questions**

Statistics - A recent article in a computer magazine suggested that the mean ...

RESEARCH AND EVALUATION II - A recent article in a computer magazine suggested ...

stastics - A recent article in a computer magazine suggested that the mean time ...

Statistics - A market research company employs a large number of typists to ...

college - A computer manufacturer is about to unveil a new, faster personal ...

statistics - A sample of 352 subscribers to Wired magazine shows the mean time ...

Statistics - A computer manufacturer is about to unveil a new, faster personal ...

statistics - A computer manufacturer is about to unveil a new, faster personal ...

Keith - The Information Systems Audit and Control Association surveyed office ...

Probability - Another Probability Question- A computer manufacturer is about to ...