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Psy 315 Wk 3 DQ 1.

Psy 315 Wk 3 DQ 1.

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Week 3 DQ 1

What is the five-step process for hypothesis testing? Is the order important? Explain why or

why not. Why do alphas differ among different fields of scientific investigation? How do

ethics affect your chosen level of significance?

Step 1: Specify the Null Hypothesis

The null hypothesis is a statement of no effect, relationship, or difference between two or

more groups or factors.

Step 2: Specify the Alternative Hypothesis

The alternative hypothesis is the statement that there is an effect or difference. This is usually

the hypothesis the researcher is interested in proving. The alternative hypothesis can be one-

sided or two-sided. We often use two-sided tests even when our true hypothesis is one-sided

because it requires more evidence against the null hypothesis to accept the alternative

hypothesis.

Step 3: Set the Significance Level (a)

The significance level is generally set at 0.05. This means that there is a 5% chance that you

will accept your alternative hypothesis when your null hypothesis is actually true. The

smaller the significance level, the greater the burden of proof needed to reject the null

hypothesis, or in other words, to support the alternative hypothesis.

Step 4: Calculate the Test Statistic and Corresponding P-Value

Hypothesis testing generally uses a test statistic that compares groups or examines

associations between variables. When describing a single sample without establishing

relationships between variables, a confidence interval is commonly used.

The p-value describes the probability of obtaining a sample statistic as or more extreme by

chance alone if your null hypothesis is true. This p-value is determined based on the result of

your test statistic. Your conclusions about the hypothesis are based on your p-value and your

significance level.

Step 5: Drawing a Conclusion

Hypothesis testing is not set up so that you can absolutely prove a null hypothesis. Therefore,

when you do not find evidence against the null hypothesis, you fail to reject the null

hypothesis. When you do find strong enough evidence against the null hypothesis, you reject

the null hypothesis. Your conclusions also translate into a statement about your alternative

hypothesis

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Week 3 DQ 1 ?What is the five-step process for hypothesis testing? Is the order important? Explain why or why not. Why do alphas differ among different fields of scientific investigation? How do ethics affect your chosen level of significance? Step 1: Specify the Null Hypothesis The null hypothesis is a statement of no effect, relationship, or difference between two or more groups or factors. Step 2: Specify the Alternative Hypothesis The alternative hypothesis is?the statement that there is an effect or difference.?This is usually the hypothesis the researcher is interested in proving. The al ...
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