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form1 - STA 3024 Homework 2 This form is only for people...

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STA 3024 Homework 2 This form is only for people whose first name starts with any letter from ”a” to”e” . Suppose we want to investigate a potential association between gender and political affilia- tion.The table below shows the data from a random sample of potential voters. Poltical party/Gender Gender Democrats Independents Republicans Females 885 992 593 Males 551 859 539 1. For our sample data, calculate the conditional proportions of a voter being in a given party knowing its gender. (Your answer should be a 2 × 3 table of conditional percentages.) 2. Now let’s use this data to conduct a chi-squared test with α = 0 . 05. (a) Calculate each cell’s expected count for the chi-squared test. (Your answer should be a 2 × 3 table of expected counts.) (b) State the assumptions made by the chi-squared test. For each assumption, state whether or not it is satisfied by our data.
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