The First National Bank of Wilson has 680 checking account customers. A recent sample of 60...
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.)
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The First National Bank of Wilson has 680 checking account
customers. A recent sample of 60...
The First National Bank of Wilson has 680 checking account customers. A recent sample of 40...
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 640 checking account customers. A recent sample of 60...
The First National Bank of Wilson has 640 checking account customers. A recent sample of 60 of these customers showed 23 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.)
The First National Bank of Wilson has 660 checking account customers. A recent sample of 40...
The First National Bank of Wilson has 660 checking account customers. A recent sample of 40 of these customers showed 36 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.) The confidence interval for the proportion is between _______ and .________
The First National Bank of Wilson has 700 checking account customers. A recent sample of 50...
The First National Bank of Wilson has 700 checking account customers. A recent sample of 50 of these customers showed 29 have a Visa card with the bank. Construct the 95% 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
Patty, a branch manager of a bank, would like a quick estimate of the mean checking account balance of all checking account customers. A random sample of checking 32 account balances results in a sample mean of $312,590.50 and a standard deviation of $52,
Patty, a branch manager of a bank, would like a quick estimate of the mean checking account balance of all checking account customers. A random sample of checking 32 account balances results in a sample mean of $312,590.50 and a standard deviation of $52,100. Calculate and interpret a 95% confidence interval for the mean checking account balance. Round off all answers to two decimal places with complete solutions.
An analyst for a large national credit union wishes to estimate the mean checking account at...
An analyst for a large national credit union wishes to estimate the mean checking account at the institution. He selected a random sample of 40 accounts and used the data to calculate the following 90% confidence interval for the mean checking account balance at the institution: $2183 < u < $3828. Interpret this confidence interval. If we took random samples of checking accounts at this credit union, about nine out of ten of them would produce this confidence interval. We...
Candidate A claims he is getting a 60% positive approval rating. A recent poll has candidate...
Candidate A claims he is getting a 60% positive approval rating. A recent poll has candidate A polling a 55% approval rating based on a sample of 600 voters (meaning 330 voters said they were approving of candidate A). Construct a 95% proportion confidence interval based on this data and determine whether the data supports the 60% claim. Start by using the binomial distribution (p + q)n = 1, and x = np. What is n? What is x? What...
Suppose you have a sample size of 36 with a mean 79 and a population standard...
Suppose you have a sample size of 36 with a mean 79 and a population standard deviation of 8. Based on this, construct a 99% confidence interval for the true population mean. As in the reading, in your calculations: --Use z = 1.645 for a 90% confidence interval --Use z = 2 for a 95% confidence interval --Use z = 2.576 for a 99% confidence interval. Give your answers as decimals, to two places [ , ] A group of...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
An article summarized results from a national survey of 2,402 Americans age 8 to 18. The...
An article summarized results from a national survey of 2,402 Americans age 8 to 18. The sample was selected to be representative of Americans in this age group. (Use a table or technology.) (a) of those surveyed, 1,125 reported owning a cell phone. Use this information to construct a 90% confidence interval estimate of the proportion of all Americans age 8 to 18 who own a cell phone. (Round your answers to three decimal places.) Interpret the interval. We are...
The First National Bank of Wilson has 700 checking account customers. A recent sample of 50 of these customers showed 29 have a Visa card with the bank. Construct the 95% 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
An analyst for a large national credit union wishes to estimate the mean checking account at the institution. He selected a random sample of 40 accounts and used the data to calculate the following 90% confidence interval for the mean checking account balance at the institution: $2183 < u < $3828. Interpret this confidence interval. If we took random samples of checking accounts at this credit union, about nine out of ten of them would produce this confidence interval. We...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
An article summarized results from a national survey of 2,402 Americans age 8 to 18. The sample was selected to be representative of Americans in this age group. (Use a table or technology.) (a) of those surveyed, 1,125 reported owning a cell phone. Use this information to construct a 90% confidence interval estimate of the proportion of all Americans age 8 to 18 who own a cell phone. (Round your answers to three decimal places.) Interpret the interval. We are...
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