QUESTION 1

1. A research wishes to examine the correlation between two quantitative variables, age and bone density. Which of the following the best graph for it?
2. Scatter plotCluster Bar ChartPareto ChartBoxplot

2 points

QUESTION 2

1. A research wishes to examine the correlation between twocategorical variables, age and bone density. Age is categorized as "Below 50" and "50 or above", and bone density is categorized as "Low", "Normal", and "High". Which of the following the best graph for it?
2. Scatter plotCluster Bar ChartPareto ChartBoxplot

2 points

QUESTION 3

1. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid but who have no private health insurance. The ages of 10 uninsured senior citizens were as follow: 68 85 66 65 71 73 75 67 69 82 What is the median?
2. 707171.57275

2 points

QUESTION 4

1. A team of researchers is conducting public health research. Several variables were observed from subjects participated in the survey. They are race, gender, height (in inches), weight (in pounds), and age (in years). Which of the following statements are correct statements. (There can be more than one correct answers.)
2. Race is a categorical variable.Weight is a categorical variable.Age is a categorical variable.Gender is quantitative variable.Height is quantitative variable.

2 points

QUESTION 5

1. After a test in a class, the instructor reported the z-score of Andy's test score, and it is 0.5. Which of the following statements is definitely correct?
2. Andy's test score is 0.5 standard deviation higher than the class average score.Andy's test score is 0.5 points more than the median of the test scores.Andy's test score is less than class average score.Andy's test score is at the 50th percentile.