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Tutorial 2_ Quesions & Solutions

Tutorial 2_ Quesions & Solutions - Tutorial 2...

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Tutorial 2 Exercises for Lecture 2 CHI-SQUARE TESTS At the end of this tutorial you should be able to conduct a chi-square goodness of fit test conduct a chi-square goodness of fit test as an alternative technique to the z test for one population proportion conduct a chi-square test of independence u Reading : Black et al , Sections 12.1 – 12.2. Q1. An inspector from the Office of Gambling Regulation wants to test a die from the local casino to ensure that it is fair. The inspector had his assistant throw the die 2652 times with the following results. Outcome Of Throw 1 2 3 4 5 6 Frequency 40 1 47 5 45 2 47 9 46 5 380 Determine whether the die is fair at the 5% level of significance. Q2. (Levine et al , p. 359) One of the biggest issues facing e-retailers is the ability to convert browsers into buyers. This is measured by the conversion rate, the percentage of browsers who buy something in their visit to a site. The reported conversion rate for llbean.com was 10.1% and for victoriasecret.com was 8.2%.
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