Orientation to statistics. Descriptive statistics: tabular and graphical presentations. Descriptive statistics: numerical summaries. Populations, samples and the normal distribution. Estimating population parameters. Statistical inference: an overview. Selection of an appropriate statistical test. Making inferences about means: the t-test. Analysis of variance. Correlation and regression. The chi-squared tests of proportions. Nonparametric methods. Methods of sample selection. Computers: a brief discussion. Appendix.