A Personality Researcher Revisits the Hypothesis That Frustration Leads to Regression.She

Multiple Choice

A personality researcher revisits the hypothesis that frustration leads to regression.She collects data from 49 female Internet users measuring their sense of personal frustration and their self-ratings of aggression.A scatterplot is shown below. Which of the following statements is true?

A) The research is not valid as it only uses females.
B) The research is not valid as the sample size is too small.
C) The research is valid but it is not reliable as all the participants were female.
D) The research is internally valid but it is not externally valid as all the participants were female.
E) None of the above.