A random sample of n1n1 = 228 people who live in a city were selected and 85 identified as a republican. A random sample of n2n2 = 101 people who live in a rural area were selected and 54 identified as a republican. Find the 95% confidence interval for the difference in the proportion of people that live in a city who identify as a republican and the proportion of people that live in a rural area who identify as a republican. Round answers to 2 decimal places, use confidence interval notation : (___ , ___)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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A random sample of n1n1  = 228 people who live in a city were selected and 85 identified as a republican. A random sample of n2n2  = 101 people who live in a rural area were selected and 54 identified as a republican. Find the 95% confidence interval for the difference in the proportion of people that live in a city who identify as a republican and the proportion of people that live in a rural area who identify as a republican.

Round answers to 2 decimal places, use confidence interval notation : (___ , ___)

 

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