Writers Den

Example

You have a hypothesis that two drugs have different effects on lowering anxiety. You would have anxiety scores for drug A and anxiety scores for drug B (all after 4 weeks of treatment) to run inferential analysis after 4 weeks.

Null hypothesis is H₀: drug A = drug B

Research hypothesis is H₁: _drug A ? drug B

Dependent variable: Anxiety score changed after treatment.

Independent variable: drug treatment

Because you did not state a direction in your hypotheses (better than or worse than), this will be a two-tailed test. You are looking for differences in either direction. You would set your alpha level of .05 and have a sample for each group of 30 people that were volunteers for the study.

Part 2

Analyze the data from Part 1 using Microsoft^® Excel^® software.

Write a 700- to 875-word paper that includes the following information:

Describe what method you are using to compare groups.

Copy and paste the output into a Microsoft^® Word document, and also answer the following questions:

What is the significance level of the comparison?

What was the alpha level you identified in Week 3?

What was the means and variance for each variable?

What was the test statistic?

What was the critical value for both the one- and two-tailed test?

Was your test one-tailed or two-tailed?

Were you able to reject the null hypothesis? In other words, did you prove there was a difference?

Talk about what these results mean in everyday language and in context to your chosen scenario.

Make a recommendation based on the findings.

Format your paper according to APA guidelines.

Example of Output You Would Use to Answer These Questions

t Test: Two-Sample Assuming Equal Variances
	Variable 1	Variable 2
Mean	4.875	8
Variance	5.267857143	18.28571429
Observations	8	8
Pooled variance	11.77678571
Hypothesized mean difference	0
df	14
t stat	-1.821237697
P(T <= t) one-tail	0.045002328
t Critical one-tail	1.761310136
P(T <= t) two-tail	0.090004655
t Critical two-tail	2.144786688