The formula for finding the sample mean is _.Every 20th patient that comes into the emergency room is given a satisfaction survey upon their discharge. Identify the sampling technique being used.Please type you answer in the cell beside the question. HLT 362V Module 1 Mean Variance Standard Deviation Conclusion: Cigarettes cause the pulse rate to increase. As the number of cigarettes increases the pulse rate increases. Given: There is a linear correlation between the number of cigarettes smoked and the pulse rate.
Now that you are familiar with the basic concepts of statistics, what are some examples of when you have seen or heard statistics used inappropriately?ĭescribe the error in the conclusion. What is an interaction? Describe an example what are the variables within your population (work, social, academic, etc.) for which you might expect interactions? How would you explain the analysis of variance, assuming that your audience has not had a statistics class before? What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)? Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. 0.1)?Įxplain when a z-test would be appropriate over a t-test. 0.01)? What are some situations in which you might accept a higher level (e.g. What are some experiments for which you might want a lower α -level (e.g. Researchers routinely choose an α-level of 0.05 for testing their hypotheses. Suppose you hear an “old-timer” say, “Why, in my day, kids were much more respectful and didn’t cause as much trouble as they do nowadays!” Formulate a hypothesis related to this statement that you could test. How large would your population have to be for a sample to be appropriate (i.e., rather than measuring the whole population)? What problems/limitations could prevent a truly random sampling and how can they be prevented? What are the characteristics of a population for which a mean/median/mode would be appropriate?Įxplain the importance of random sampling. How could graphics and/or statistics be used to misrepresent data? Where have you seen this done?