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PSY 325 PSY325 Week 5 Final Exam Answers (Ashford)


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PSY 325 Statistics for the Behavioral & Social Sciences




Essay Question 1:


For the following essay, I will be determining which vaccine is the best of use in prevention of catching the flu virus. During this study, there are two vaccinations available to the public; a shot or a nasal spray. Shots are most common for adults and older children; however, the nasal spray is an alternative to use for prevention. To determine which method is most effective, 1000 participants were chosen to be tested. The individuals were then divided up equally into two separate groups; 500 per group. The first group was tested by the shot, while the second was tested by 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.


Essay Question 2:


For the following essay, the topic that will be analyzed is on a correlational study. A researcher has investigated the relationship between IQ and grade point average (GPA). The correlation was found to be .75, which is a strong and positive correlation on account of it being a direct relationship. A positive correlation is when two variables react in the same manner, in other words, increasing or decreasing collectively. Hypothetically speaking, if a person’s IQ increases, the chance of their GPA increasing is distinctly possible, as well. Yet, there are still a number of factors that could assist in an increase of an individual’s GPA such as, receiving additional guidance from the instructor or hiring a private tutor.


Essay Question 3:


In this essay, the main subject matter is to demonstrate how to organize data intomeaningful sets, calculate basic descriptive statistics, interpret the results, and evaluate the effects of outliers and changes in the variables. To begin the study, a researcher has recorded the reaction times of 20 different individuals on a memory assessment. The set of reaction times of each individual is as follows: 2.2, 4.7, 7.3, 4.1, 9.5, 15.2, 4.3, 9.5, 2.7, 3.1, 9.2, 2.9, 8.2, 7.6, 3.5, 2.5, 9.3, 4.8, 8.5, 8.1 (Calculator Soup, 2013). In this data set there is no outlier present.




Texting and Driving






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