S W 318 Midterm: In-Class Review Exam 2
Document Summary
Know how to compute z scores and confidence intervals. Chapter 9: testing hypothesis: independent sample t-test. Know what paired sample t-test is but don"t have to know how to compute them. Make sure you can figure out what test you need for whatever the question being asked is. P value = . 95 this means that there are ninety-five chances out of one hundred that you are wrong or that your results are simply due to chance. Reject h(0) null hypothesis: when p is less than alpha. Support h(1) research hypothesis: when p is less than alpha. Know what z scores correspond to confidence levels 90, 95, 99. Standard deviation goes down precise point estimate goes up. Standard deviation goes down precise/narrower confidence interval goes up. Sample size goes up precise point estimate goes up. Sample size goes up precise/narrower confidence interval goes up. Confidence interval goes up precision goes down. Confidence interval goes up confidence level goes up.
