# Inferential research and statistics project

Inferential research and statistics project

Format MLA

Volume of 1100 – 1650 words (5 pages)

Assignment type : Coursework

Description:

Clinicians at a small clinic have been introduced to a new method to treat post-traumatic stress disorder (PTSD) in their clients for veterans. Research indicates that virtual reality (VR) is a highly effective treatment option for patients with PTSD. Currently, the clinic uses only cognitive processing therapy (CPT) with their patients suffering from PTSD. The clinicians would like to find out whether VR therapy has different results from CPT therapy. The measure used by the clinic to measure PTSD symptoms is the Combat Exposure Scale. Both therapies need to be applied for a minimum of 12 weeks to be effective.

Write a 525- to 750-word paper that addresses the following for your chosen scenario:

• Clearly define the problem or issue you are addressing. Provide a brief background of any research you have found that might affect your research hypothesis.

• Create a research hypothesis based on the information provided in each scenario. You have been given a data set (Excel document) with two sets of interval data (just the numbers, as you must decide what they represent, such as method A results or method B results). This means you are going to test one thing against another, such as which method works best (step 1 of the steps to hypothesis testing). State the null and research hypotheses. Explain whether these hypotheses require a one-tailed test or two-tailed test, and explain your rationale.

• Describe the sample you will use. Sample size will be 30 for each group, which are provided in your data set. Explain what type of sampling you selected.

• Do you think you would also collect some descriptive data, such as gender, age, or shift? Why do you think it makes sense to collect descriptive data?

Format your paper according to APA guidelines.

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 for 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:

o What is the significance level of the comparison?
o What was the alpha level you identified in Week 3?
o What was the means and variance for each variable?
o What was the test statistic?
o What was the critical value for both the one- and two-tailed test?
o Was your test one-tailed or two-tailed?
o 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

Part 3

Create a 12- to 15-slide presentation using the information you gathered and submitted in Weeks 3 & 4. Include the following:

• Describe the problem, and provide some brief background about the situation.

• Explain the research hypothesis.