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.
- What is the decision rule? (rounded to 2 decimals)H0 when z <
- Value of the test statistic? (rounded 3 places)
- What is the p-value? (rounded 4 decimals)