Ashford – Week 5 Individual Assignment

Ashford – Week 5 Individual Assignment

Instructor’s Guidance Info

Please include the following general headings for each section of the written exam within your Word document:

Also, it is very well explained under Week 5, but do pay attention to each and every word in the directions. Details are important.

Part I: Essay Questions

1. Essay 1

2. Essay 2

3. Essay 3

Part II: Research Study Critique

1. Introduction

2. Methods

3. Results

4. Discussion

Part I: Essay Questions

Essay 1

A group of researchers conducted an experiment to determine which vaccine is more effective for preventing getting the flu. They tested two different types of vaccines: a shot and a nasal spray. To test the effectiveness, 1000 participants were randomly selected with 500 people getting the shot and 500 the nasal spray. Of the 500 people were treated with the shot, 80 developed the flu and 420 did not. Of the people who were treated with the nasal spray, 120 people developed the flu and 380 did not. The level of significance was set at .05. The proportion of people who were treated with the shot who developed the flu = .16, and the proportion of the people who were treated with the nasal spray was .24. The calculated p value = .0008.

Essay 2

A researcher has investigated the relationship between IQ and grade point average (GPA) and found the correlation to be .75.

For this essay, critique the results and interpretation of a correlation study.

· Evaluate the correlation result and identify the strength of the correlation.

· Examine the assumptions and limitations of the possible connection between the researcher’s chosen variables.

· Identify and describe other statistical tests that could be used to study this relationship.

Your essay response must address the following questions:

· How strong is this correlation?

o Is this a positive or negative correlation?

o What does this correlation mean?

· Does this correlation imply that individuals with high Intelligence Quotients (IQ) have high Grade Point Averages (GPA)?

· Does this correlation provide evidence that high IQ causes GPA to go higher?

o What other variables might be influencing this relationship?

· What is the connection between correlation and causation?

· What are some of the factors that affect the size of this correlation?

· Is correlation a good test for predicting GPA?

o If not, what statistical tests should a researcher use, and why?

Essay 3

A researcher has recorded the reaction times of 20 individuals on a memory assessment. The following table indicates the individual times: