STAT 200 Lecture Notes - Lecture 4: Dependent And Independent Variables, Statistical Significance, Bar Chart
Document Summary
Types of parameters and statistics mean proportion correlation parameter statistics nu. Now learning how to take sample data and formally make decisions about the population. Use sample data to learn and make decisions about the population. How to write hypotheses measuring evidence against the null hypothesis. If there is truly no preference, we expect proportion of odd numbers to be 0. 5. Even if the true population is 0. 5, sample statistics vary. Statistics gives us a formal way to answer this question. A statistical test is used to determine whether results from a sample are convincing enough to allow us to conclude something about the population. For our random number example, we wish to use our sample data to conclude that the population proportion is less than. Other things we might want to show include. Heartrate higher in exercise group than sitting group. Drinking green tea is more effective than coffee at increasing immune response.
