The following information is available.
- H0 : μ ≥ 220
- H1 : μ < 220
A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the .025 significance level.
Is this a one- or two-tailed test?
We are only testing that the mean is less than 220, therefore this is a one-tailed test.
What is the decision rule?
Reject H0 if z > -1.96
What is the value of the test statistic?
Use the formulas in the photo below to solve for the test statistic in this problem
What is your decision regarding H0?Reject H0
What is the p-value?
Find the p-value in excel using the following formula: =NORM.DIST(test_statistic_value,0,1,TRUE).0038
- Student: Not Provided
- Textbook: Statistical, Techniques in Business & Economics
- Course: QNT 351