| H0 : population mean μ0 = 120 Sample of n = 64 was collected and sample mean is x = 125. Assuming that the population standard deviation is σ = 20, calculate test statistics.
1.5 |
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| 2.0 | ||||
| 2.5 | ||||
| 3.0 |
1.) During the trial Null Hypothesis is: person is not guilty.
If jury found the person not guilty, but in a fact he committed the crime,
was is Type I or Type II error?
2.)
Federal administration claims that unemployment level in US is 8.6%
(population proportion = 0.086). A hypothesis test is to be performed
to decide whether unemployment level in NY State is different from the national level.
a) setup the null hypothesis
b) setup the alternative hypothesis
c) classify the hypothesis test as two-tailed, left-tailed or right-tailed
| Ho: p = 0.086; H1: P ≠ 0.086 Two-Tailed test |
| Ho: p = 0.086; H1: P > 0.086 Right-Tailed test |
| Ho: p = 0.086; H1: P < 0.086 Left-Tailed test |
| Ho: p < 0.086; H1: P = 0.086 Two-Tailed test |
3.)
Use Appendix Table II to find cutoff zvalue (critical value)
for left-tailed test with significance level 8%.
| − 2.1 |
| − 1.7 |
| − 1.4 |
| − 1.2 |
