ISDS 2000 : Test 3 Study Guide
15 Mar 2019
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Document Summary
Know how to conduct z-test for population proportions (9. 4). Be able to: given sample data on a categorical variable, calculate the point estimate of the population proportion (this is just the sample proportion, p) calculate test statistic z p. Understand that there are two types of estimates: (chapter 8) point estimates and interval estimates. Know how to calculate confidence intervals (chapter 8) 1( n population must be normal and/or n 30. )n population must be normal and/or n 30 np 5 and n(1-p) 5 p. Understand how the confidence level (cl) effects the size/width of the ci (ch 8) as cl , z , margin of error , ci width as cl , z , margin of error , ci width . Know how to conduct two-sample t-tests for differences in population means (10. 1). 2 df = n1 + n2 2 calculate t-test statistic t.
