Bivariate Analysis

Please give examples of variables that can be analyzed and hypotheses that can be tested using T-tests, Chi-Square, and correlation analysis.

Be sure to define the variables, their levels of measurement, and the appropriate statistical test.

Example:

T-test: difference between mean cholesterol levels of obese and non-obese individuals. Cholesterol level is a continuous variable, and obesity is a dichotomous variable (obesity yes/no).

Chi Square: Is there a relationship between oral contraceptive use and infertility? Both variables are dichotomous: oral contraceptive use yes/no, infertility yes/no.

Correlation: Is fiber intake inversely related to fat intake? Both fat intake and fiber intake are continuous and are expressed in grams.