In order to test if the mean IQ of employees in an organization is greater than 100, a sample of 30 employees is taken. The sample value of the computed z-statistic = 3.4. The appropriate decision at a 5% significance level is to:
|
A) |
reject the null hypothesis and conclude that the population mean is not equal to 100. | |
|
B) |
reject the null hypotheses and conclude that the population mean is greater than 100. | |
|
C) |
reject the null hypothesis and conclude that the population mean is equal to 100. | |
Ho:μ ≤ 100; Ha: μ > 100. Reject the null since z = 3.4 > 1.65 (critical value). | 
发表于 2010-4-16 09:50
|