Module 01 - Case Assignment

Hypothesis Testing

1. If, in testing a null hypothesis regarding the relationship between two variables, we found that the relationship observed in our sample is so strong that it or a stronger relationship would have occurred by chance alone only one time in 10,000, what is the null hypothesis and alternative hypothesis? should we accept or reject the null hypothesis? why
2. If we test for difference between in the means of two samples that the mean difference is so small that it would occur by chance alone 10 percent of the time, what is the null hypothesis and alternative hypothesis? what should our action be regarding the null hypothesis or mean difference? why
3. If the level of significance for the null hypothesis is set at 0.05, what should the researcher's decision be in each of the following situations? why

1. if p<0.05
2. if p>0.05
3. if p<0.01
4. if p>0.01

4.Is a one-tailed test or a two-tailed test more likely to reject the null hypothesis? why

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