A Forensic Psychologist Studying the Accuracy of a New Type

Essay

A forensic psychologist studying the accuracy of a new type of polygraph (lie detector)test instructed a participant ahead of time to lie about some of the questions asked by the polygraph operator.On average,the current polygraph test is 75% accurate,with a standard deviation of 6.5%.With the new machine,the operator correctly identified 83.5% of the false responses.Using the .05 level of significance,is the accuracy of the new polygraph different from the current one?
a.Use the five steps of hypothesis testing.
b.Sketch the distributions involved.
c.Explain the logic of what you did to a person who is familiar with graphs of distributions,the mean,standard deviation,Z scores,the normal curve and normal curve tables,and the basics of probability,but knows nothing else about statistics.Be sure your explanation includes the overall logic of hypothesis testing including each of the five steps.