WGU C955 - Module 6: Correlation & Regression, Questions and answers. VERIFIED | 30 Pages

A researcher wants to know if there was a relationship between student age and desire to complete a college degree. To answer this question, the researcher used a local community college as the sampling frame and then used stratified sampling to get a sample of students from 18 to 80 years old. Based on the information given, is there any potential bias in this study? a Yes, because the sampling frame does not match the intended population of the question. b Yes, because the sampling method will not give a representative sample. c Yes, because a voluntary sample should have been used. d No, there will likely be no bias in this study. - -Yes, because the sampling frame does not match the intended population of the question. A researcher conducts an observational study and finds a correlation between managers' income and the number of college credits earned. The correlation coefficient was r=.85 with a regression equation of y=515x+12000. What can you say about the relationship between these variables? a There is an association between these variablesb There is a causation between these variables. c There is no relationship between these variables. d There is not enough information to determine the relationship between the variables. - -There is an association between these variables