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A discount brokerage selected a random sample of 64 customers and reviewed...
As part of an annual review of its accounts, a discount brokerage selects a random sample...
As part of an annual review of its accounts, a discount brokerage selects a random sample of 25 customers. Their accounts are reviewed for total account valuation, which showed a mean of $36,300, with a sample standard deviation of $8,950. (Use t Distribution Table.) What is a 90% confidence interval for the mean account valuation of the population of customers? (Round your answers to the nearest dollar amount.)
As part of an annual review of its accounts, a discount brokerage selects a random sample...
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 $36,700, with a sample standard deviation of $8,500. (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...
As part of an annual review of its accounts, a discount brokerage selects a random sample...
As part of an annual review of its accounts, a discount brokerage selects a random sample of 29 customers. Their accounts are reviewed for total account valuation, which showed a mean of $31,500, with a sample standard deviation of $8,650. (Use t Distribution Table.) What is a 95% confidence interval for the mean account valuation of the population of customers? (Round your answers to the nearest dollar amount.)
Suppose a random sample of size 64 is selected from a population. The sample yields a...
Suppose a random sample of size 64 is selected from a population. The sample yields a mean of 26 and a standard deviation of 4. From this information, the 90% confidence interval to estimate the population mean can be computed to be _______.
As a part of its annual review of accounts, a brokerage firm selects a random sample...
As a part of its annual review of accounts, a brokerage firm selects a random sample of 15 customers. The average account value for these customers was $32,000 with a standard deviation of $8,200. Determine the 95% confidence interval for the account value.
4. A simple random sample of 100 customers is selected from an account receivable portfolio and...
4. A simple random sample of 100 customers is selected from an account receivable portfolio and the sample mean account balance is $3000. The population standard deviation σ is known to be $300. ( 8 marks) a. Construct a 90% confidence interval for the mean account balance of the population. b. What is the margin of error for estimating the mean account balance at the 90% confidence level? c. Construct a 90% confidence interval for the mean account balance of...
i started it but then i got lost, please correct me if im wrong! also, include...
i started it but then i got lost, please correct me if im wrong!
also, include sketch, thank u :)
During a national debate on changes to health care, a cable news service performs an opinion poll of 500 small business owners. It shows that 65% of small-business owners do not approve of health care changes. Develop a 95% confidence interval for the proportion opposing health care changes. Use 4 decimal places. Answers Point Estimate 0.65 0.65 Standard Error 0.04...
Data were collected on the amount spent by 64 customers for lunch at a major Houston...
Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based upon past studies the population standard deviation is known with ơ $5. Click on the datafile logo to reference the data. DATA file Round your answers to two decimal places. Use the critical value with three decimal places. a. At 99% confidence, what is the margin of error? . Develop a 99% confidence...
1. A random sample of 82 customers, who visited a department store, spent an average of...
1. A random sample of 82 customers, who visited a department store, spent an average of $71 at this store. Suppose the standard deviation of expenditures at this store is O = $19. What is the e 98% confidence interval for the population mean? 2. A sample of 25 elements produced a mean of 123.4 and a standard deviation of 18.32 Assuming that the population has a normal distribution, what is the 90% confidence interval for the population mean? 3....
1. A sample size of n-20 is a simple random sample selected from a normally distributed...
1. A sample size of n-20 is a simple random sample selected from a normally distributed population. Find the critical value ta2 corresponding to a 95% confidence level. 2.093 O 2.086 02.861 1.960 2. Assume you want to construct a 90% confidence interval from sample of a distributed population. The sample size is 37. Find the critical value to2 1.687 2.719 1.688 O1.645 3. You are constructing a 95% confidence interval of a sample space consisting of n = 40...
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 $36,700, with a sample standard deviation of $8,500. (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...
i started it but then i got lost, please correct me if im wrong!
also, include sketch, thank u :)
During a national debate on changes to health care, a cable news service performs an opinion poll of 500 small business owners. It shows that 65% of small-business owners do not approve of health care changes. Develop a 95% confidence interval for the proportion opposing health care changes. Use 4 decimal places. Answers Point Estimate 0.65 0.65 Standard Error 0.04...
Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based upon past studies the population standard deviation is known with ơ $5. Click on the datafile logo to reference the data. DATA file Round your answers to two decimal places. Use the critical value with three decimal places. a. At 99% confidence, what is the margin of error? . Develop a 99% confidence...
1. A random sample of 82 customers, who visited a department store, spent an average of $71 at this store. Suppose the standard deviation of expenditures at this store is O = $19. What is the e 98% confidence interval for the population mean? 2. A sample of 25 elements produced a mean of 123.4 and a standard deviation of 18.32 Assuming that the population has a normal distribution, what is the 90% confidence interval for the population mean? 3....
1. A sample size of n-20 is a simple random sample selected from a normally distributed population. Find the critical value ta2 corresponding to a 95% confidence level. 2.093 O 2.086 02.861 1.960 2. Assume you want to construct a 90% confidence interval from sample of a distributed population. The sample size is 37. Find the critical value to2 1.687 2.719 1.688 O1.645 3. You are constructing a 95% confidence interval of a sample space consisting of n = 40...
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