Presentation and description of statistical data. Probability: concept of probability, probability rules. Random variables and probability distributions, expectation, Binomial distribution, Normal distribution. Sampling distributions, t-distribution, central limit theorem. Estimation, point and interval estimation for normal population mean and the difference of two population means. Testing hypotheses, the z-test, the t-test, testing the difference between two means (small and large sample sizes). Correlation and simple linear regression, estimation and testing hypothesis, residuals analysis