Question

Supermarket shoppers were observed and questioned immediately after putting an item in their cart. Of a random sample of 270 choosing a product at the regular price, 200 claimed to check the price before putting the item in their cart. Of an independent random sample of 230 choosing a product at a special price, 188 made this claim. Find a 99% confidence interval for the difference between the two population proportions.

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 answear<Px−Py<answear.

(Round to four decimal places as needed.)

Answer #1

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In a marketing survey, a random sample of 980 supermarket
shoppers revealed that 272 always stock up on an item when they
find that item at a real bargain price.
(a) Let p represent the proportion of all supermarket
shoppers who always stock up on an item when they find a real
bargain. Find a point estimate for p. (Use 3 decimal
places.)
(b) Find a 99% confidence interval for p. (Use 3 decimal
places.)
lower limit
upper limit
(c)...

In a marketing survey, a random sample of 998 supermarket
shoppers revealed that 276 always stock up on an item when they
find that item at a real bargain price.
(a) Let p represent the proportion of all supermarket
shoppers who always stock up on an item when they find a real
bargain. Find a point estimate for p. (Use 3 decimal
places.)
(b) Find a 95% confidence interval for p. (Use 3 decimal
places.)
lower limit
upper limit
(c)...

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to rounding. In
a marketing survey, a random sample of 1020 supermarket shoppers
revealed that 272 always stock up on an item when they find that
item at a real bargain price. (a) Let p represent the proportion of
all supermarket shoppers who always stock up on an item when they
find a real bargain. Find a point estimate for p....

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
In a marketing survey, a random sample of 1000 supermarket
shoppers revealed that 268 always stock up on an item when they
find that item at a real bargain price.
(a) Let p represent the proportion of all supermarket shoppers
who always stock up on an item when they find a real bargain. Find
a point estimate for p....

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
In a marketing survey, a random sample of 982 supermarket shoppers
revealed that 260 always stock up on an item when they find that
item at a real bargain price.
(a)
Let p represent the proportion of all supermarket
shoppers who always stock up on an item when they find a real
bargain. Find a point estimate for p....

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
In a marketing survey, a random sample of 1000 supermarket shoppers
revealed that 264 always stock up on an item when they find that
item at a real bargain price.
(a)
Let p represent the proportion of all supermarket
shoppers who always stock up on an item when they find a real
bargain. Find a point estimate for p....

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
In a marketing survey, a random sample of 994 supermarket
shoppers revealed that 268 always stock up on an item when they
find that item at a real bargain price.
(a) Let p represent the proportion of all supermarket shoppers
who always stock up on an item when they find a real bargain. Find
a point estimate for p....

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to rounding. In
a marketing survey, a random sample of 1018 supermarket shoppers
revealed that 276 always stock up on an item when they find that
item at a real bargain price.
(a) Let p represent the proportion of all supermarket shoppers
who always stock up on an item when they find a real bargain. Find
a point estimate for p....

For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to rounding. In
a marketing survey, a random sample of 1020 supermarket shoppers
revealed that 262 always stock up on an item when they find that
item at a real bargain price.
(a) Let p represent the proportion of all supermarket shoppers
who always stock up on an item when they find a real bargain. Find
a point estimate for p....

Question #1
For this problem, carry at least four digits after the decimal
in your calculations. Answers may vary slightly due to
rounding.
Santa Fe black-on-white is a type of pottery commonly found at
archaeological excavations at a certain monument. At one excavation
site a sample of 602 potsherds was found, of which 370 were
identified as Santa Fe black-on-white. Let p represent the
proportion of Santa Fe black-on-white potsherds at the excavation
site. Find a point estimate for p....

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