Homework 5 - Graded Homework 5 You have submitted this...

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Graded Homework 5 You have submitted this Homework 2 times (including this time). You may submit this Homework a total of 40 times and receive full credit. This homework deals with hypothesis testing for two population means with known variances (what we call case 1 out of three possible situations for two normally distributed populations). This material is on pages 51-53 in your course packet. Question #1 Identify whether the two samples in each of these questions are independent or dependent. 1. High-school juniors and seniors usually take the ACT test as one of the requirements for the university application process. Kaplan, the company that specializes in helping students get good scores on the ACT exam claims that if you take their class, your score will improve. We want to test the claim and gather ACT scores of 101 students before they took the Kaplan course and then again after they took the Kaplan course. In this case, we have o independent samples. o dependent samples. 2. We want to test whether juniors in the business school have higher average grades than sophomores. We collect data on 100 sophomores and 95 juniors. In this case, we have o independent samples. o dependent samples. 3.
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This note was uploaded on 04/07/2008 for the course ECON 203 taught by Professor Petry during the Spring '08 term at University of Illinois at Urbana–Champaign.

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Homework 5 - Graded Homework 5 You have submitted this...

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