Question: 9.96 A national daily conducted a reader poll on whether bike riders without a helmet should be heavily fined. Suppose that independent samples are taken

9.96 A national daily conducted a reader poll on whether “bike riders without a helmet should be heavily fined”. Suppose that independent samples are taken from urban and rural responses, and it is found that 38 out of 140 people from urban areas and 24 out of 120 people from rural areas are against this statement.

Construct a 95% confidence interval for the difference, Pu − Pr , between the proportion of people from these two areas who oppose the statement.

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