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Author Question: Use the two-proportions z-interval procedure to obtain the required confidence interval for the ... (Read 106 times)

natalie2426

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Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between two population proportions.  Assume that independent simple random samples have been selected from the two populations.

In a random sample of 53 Democrats from one city, 11 approved of the mayor's performance. In a random sample of 57 Republicans from the city, 21 approved of the mayor's performance.  Find a 90% confidence interval for the difference between the proportions of Democrats and Republicans who approve of the mayor's performance.
◦ 0.067 to 0.348
◦ 0.040 to 0.374
◦ -0.300 to -0.021
◦ 0.041 to 0.374


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Marked as best answer by natalie2426 on Apr 7, 2020

ryrychapman11

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natalie2426

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Reply 2 on: Apr 7, 2020
Excellent


DylanD1323

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Reply 3 on: Yesterday
:D TYSM

 

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