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PSY 325 Final Exam Paper

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Question;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.;We;have to research Is there any significant difference between two typres of;vaccine i.e, a shot and nasal spray used for preventing nasal spray?;2.;A researcher has investigated the relationship between IQ and grade point;average (GPA) and found the correlation to be.75.;(a) The amount of variability in either variable, X or Y;(b) Differences in the shapes of the;two distributions;(c) Lack of linearity in the relationship between X and Y;(d) The presence of one or more ?outliers? in the dataset;(e) Characteristics of the sample used for the calculation;of the correlation and;(f) Measurement error.;3.;A researcher has recorded the reaction times of 20 individuals on a memory;assessment. The following table indicates the individual times

 

Paper#59782 | Written in 18-Jul-2015

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