RES/710: Statistical Research Methods And Design I

Wk 2 Quiz: Organizing and Visualizing Data

Assignment Content: Complete the Week 2 Quiz: Organizing and Visualizing Data.

• Question 5 A researcher finds that the mean age in a dataset is 44.6 and the median age is 45. What does this suggest about the shape of the age distribution? Option A The distribution is skewed to the right. Option B The distribution has high variability. Option C The distribution is skewed to the left. Option D The distribution is symmetrical.
• Question 6 A nonprofit organization collected survey responses using satisfaction categories ranging from "Very Unsatisfied" to "Very Satisfied." Which type of graph would best represent how often each category was selected? Option A Histogram Option B Box plot Option C Line graph Option D Bar chart
• Question 7 Which of the following is an example of a variable that classifies individuals into distinct groups (i.e., categorical variable)? Option A Test score on a 100-point scale Option B Salary in dollars Option C Age in years Option D Marital status
• Question 8 Which type of graph is most useful for identifying outliers in a dataset? Option A Bar chart Option B Pie chart Option C Box plot Option D Histogram
• Question 9 A school administrator wants to compare test performance across grade levels. What summary measure would most directly help them compare typical performance between the groups? Option A Correlation Option B Range Option C Mean Option D Standard deviation
• Question 10 Why are descriptive statistics a critical first step before conducting more advanced analyses? Option A They help summarize the data and identify patterns or issues. Option B They are only used when data is non-numeric. Option C They prove whether a relationship exists between variables. Option D They determine which hypothesis test to use.