Supermarket shoppers were observed and questioned immediately after putting an item in their cart. Of a random sample of 230 choosing a product at the regular price, 142 claimed to check the price before putting the item in their cart. Of an independent random sample of 270 choosing a product at a special price, 185 made this claim. Find a 99% confidence interval for the difference between the two population proportions. www Let Px be the population proportion of shoppers choosing a product at the regular price who claim to check the price before putting it into their cart and let Py be the population proportion of shoppers choosing a product at a special price who claim to check the price before putting it into their cart. The 99% confidence interval is
Supermarket shoppers were observed and questioned immediately after putting an item in their cart. Of a random sample of 230 choosing a product at the regular price, 142 claimed to check the price before putting the item in their cart. Of an independent random sample of 270 choosing a product at a special price, 185 made this claim. Find a 99% confidence interval for the difference between the two population proportions. www Let Px be the population proportion of shoppers choosing a product at the regular price who claim to check the price before putting it into their cart and let Py be the population proportion of shoppers choosing a product at a special price who claim to check the price before putting it into their cart. The 99% confidence interval is
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Supermarket shoppers were observed and questioned immediately
after putting an item in their cart. Of a random sample of 230 choosing a
product at the regular price, 142 claimed to check the price before
putting the item in their cart. Of an independent random sample of 270
choosing a product at a special price, 185 made this claim. Find a 99%
confidence interval for the difference between the two population
proportions.
www
Let Px be the population proportion of shoppers choosing a product at
the regular price who claim to check the price before putting it into their
cart and let Py be the population proportion of shoppers choosing a
product at a special price who claim to check the price before putting it
into their cart.
The 99% confidence interval is <P-Py<
(Round to two decimal places as needed.)
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