Question

The First National Bank of Wilson has 660 checking account customers. A recent sample of 50 of these customers showed 28 have a Visa card with the bank. Construct the 98% confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Use z Distribution Table.) (Round your answers to 3 decimal places.)

Answer #1

The First National Bank of Wilson has 660 checking account
customers. A recent sample of 60 of these customers showed 35 have
a Visa card with the bank. Construct the 99% confidence interval
for the proportion of checking account customers who have a Visa
card with the bank. (Use z Distribution Table.) (Round your answers
to 3 decimal places.)
Confidence interval for the
proportion is between
and

The First National Bank of Wilson has 740 checking account
customers. A recent sample of 50 of these customers showed 27 have
a Visa card with the bank.
Construct the 99% confidence interval for the proportion of
checking account customers who have a Visa card with the bank. (Use
z Distribution Table.) (Round your answers to 3 decimal
places.)

The First National Bank of Wilson has 720 checking account
customers. A recent sample of 60 of these customers showed 22 have
a Visa card with the bank.
Construct the 98% confidence interval for the proportion of
checking account customers who have a Visa card with the bank. (Use
z Distribution Table.) (Round your answers to 3 decimal
places.)
Confidence interval for the proportion is between and
.

The First National
Bank of Wilson has 680 checking account customers. A recent sample
of 40 of these customers showed 27 have a Visa card with the
bank.
Construct the 90% confidence interval for the proportion of
checking account customers who have a Visa card with the bank. (Use
z Distribution Table.) (Round your answers to 3
decimal places.)

The First National Bank of Wilson has 680 checking account
customers. A recent sample of 60 of these customers showed 21 have
a Visa card with the bank.
Construct the 90% confidence interval for the proportion of
checking account customers who have a Visa card with the bank. (Use
z Distribution Table.) (Round your answers to 3
decimal places.)

The First National Bank of Wilson has 600 checking account
customers. A recent sample of 60 of these customers showed 35 have
a Visa card with the bank? Construct the 90% confidence interval
for the proportion of checking account customers who have a Visa
card with the bank.

The bank in Cobden, Ontario, has 650 chequing account customers.
A recent sample of 50 of these customers showed 26 to have a Visa
card with the bank.
Construct the 99% confidence interval for the proportion of
chequing account customers who have a Visa card with the bank.
(Round the final answers to 3 decimal places.)
The 99% Confidence interval for the proportion of chequing
account customers is between___and___.

Wachovia Bank has 800 checking account customers. A recent
sample of 60 of these showed 35 to have a Visa card with the
bank.
Construct the 99% confidence interval for the proportion of
checking account customers who have a Visa with the bank.
b. What sample size would be needed if you want the estimated
proportion to be within 4% of the population proportion at the 99%
confidence level?
if possible draw distributions?
Thanks in advance

As part of an annual review of its accounts, a discount
brokerage selects a random sample of 28 customers. Their accounts
are reviewed for total account valuation, which showed a mean of
$33,400, with a sample standard deviation of $8,650. (Use t
Distribution Table.)
What is a 98% confidence interval for the mean account valuation
of the population of customers? (Round your answers to the nearest
dollar amount.) 98% confidence interval for the mean account
valuation is between $ and...

First National Bank and City National Bank are competing for
customers who would like to open IRAs (individual retirement
accounts). Thirty-two weeks were randomly selected for First
National Bank and another (different) 32 weeks were randomly
selected for City National. The total amount deposited into IRAs is
noted for each week. A summary of data (deposits are recorded in
thousands of dollars) from the survey is as follows: First
National: x-bar = 4.1, sigma = 1.2 City National: x-bar =...

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