Match the correct inferential test to the description of the variable under investigation. Each answer is used only once. (chi-square, independent t test, correlation, one way ANOVA)

a)Study of gender (M/F) and smoking(yes/no)

b)Mean number of minutes on treadmill compared between healthy adult volunteers and persons with stable chronic respiratory condition

c)Mean scores (range from 0 to 100) on a scale measuring quality of life between 4 groups: persons with diabetes ,persons with heart disease, persons with COPD, persons with rheumatoid arthritis

d)Systolic blood pressure (mmHg) and weight (in kg)

What are the three characteristics of the normal distribution?

a)Bell-shaped

b)Unimodal

c)Mean, median, and mode are all on the center point of the curve.

d)The standard deviation is always equal to zero (0).

e)The mean is always located to the right of the median.

When presenting the demographic attributes of the sample in a study, the researcher reports on the two study groups and the following characteristics: gender (male/female); marital status (single, married, separated/divorced; widowed); educational level (some high school, high school graduate, some college, college graduate); and age (measured in years). For which of these variables would the researcher show a t value?

a)Age

b)Educational level

c)Marital status

d)Gender