Free WGU Data-Driven-Decision-Making Exam Questions

Which two types of graphs illustrate and analyze measurements or trends over time? Choose 2 answers.

A researcher seeks to pass a bond issue and asks a sample of respondents who have a bachelor’s degree if they are voting in favor of the bond because it would be beneficial to the county. Which type of error does this represent?

A researcher wants to estimate the average wholesale price of a gallon of gas in the United States. Several gas station owners along the East Coast are asked what price they pay wholesale for a gallon of gas. The researcher then averages these values for the sample mean price of a gallon of gas. Which problem would be discovered if this researcher’s work were evaluated?

When researchers are studying the effect of new drug treatments on patients, bias can be introduced by patients if they are aware of who receives the placebo. Which type of research design eliminates this type of bias?

Which two types of graphs illustrate and analyze measurements or trends over time? Choose 2 answers.