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Question 8 (2 points) Following are interest rates (annual percentage rates) for a 30-year-fixed-rate mortgage from...
Question 16 (5 points) Following are interest rates (annual percentage rates) for a 30-year-fixed-rate mortgage from...
Question 16 (5 points) Following are interest rates (annual percentage rates) for a 30-year-fixed-rate mortgage from a sample of lenders in a certain city. It is reasonable to assume that the population is approximately normal. 4.327, 4.461, 4.547, 4.324, 4.365, 4.326 , 4.842 GP Find the upper bound of the 99% confidence interval for the mean rate.
Following are interest rates (annual percentage rates) for a 30- year-fixed-rate mortgage from a sample of...
Following are interest rates (annual percentage rates) for a 30- year-fixed-rate mortgage from a sample of lenders in a certain city. It is reasonable to assume that the population is approximately normal 4.327, 4.461, 4.547, 4.368,4.365, 4.422,4.842 Find the upper bound of the 99% confidence interval for the mean rate. Round to three decimal places (for example: 4.015). Write only a number as your answer. Do not write any units Your Answer: Answer Save Question 17 (5 points) In the...
Please explain how to Solve. Thank you 16. The following are interest rates (annual percentage rates)...
Please explain how to Solve. Thank you 16. The following are interest rates (annual percentage rates) for a 30-year-fixed-rate mortgage from a sample of lenders in a certain city. It is reasonable to assume that the population is approximately normal. 4.327, 4.461, 4.547, 4.813, 4.365, 4.772, 4.842. Find the upper bound of the 99% confidence interval for the mean rate. Round three decimal places. 4. A survey of high school students revealed that the number of soft drinks consumed per...
Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from...
Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from a sample of lenders in Macon, Georgia for one day. It is reasonable to assume that the population is approximately normal. 4.754 4.372 4.174 4.678 4.424 4.227 4.123 4.254 3.951 4.291 4.414 Send data to Excel Part: 0/2 Part 1 of 2 (a) Construct a 95% confidence interval for the mean rate. Round the answer to at least four decimal places. A 95% confidence...
Question 13 (5 points) Scientists want to estimate the mean weight of mice after they have...
Question 13 (5 points) Scientists want to estimate the mean weight of mice after they have been fed a special diet. From previous studies, it is known that the weight is normally distributed with standard deviation 5 grams. How many mice must be weighed so that a 95% confidence interval will have margin of error of 0.5 grams? Write only an integer as your answer. Your Answer: Answer Question 17 (5 points) In the computer game World of Warcraft, some...
2 Based on the confidence that the population standard deviation of mortgage rates is greater than...
2 Based on the confidence that the population standard deviation
of mortgage rates is greater than 0.7
olo Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from a sample of lenders in Macon, Georgia, on June 20, 2013. Assume that the population is approximately normal. 4.286 4.325 4.134 4.581 4.908 4.429 4.689 3.319 4.84 4.568 4.847 4.996 Send data to Excel Part 1 of 3 (a) Find the sample standard deviation s. Round...
Exercise 8-7 Algo In order to estimate the mean 30-year fixed mortgage rate for a home...
Exercise 8-7 Algo In order to estimate the mean 30-year fixed mortgage rate for a home loan in the United States, a random sample of 15 recent loans is taken. The average calculated from this sample is 7.85%. It can be assumed that 30-year fixed mortgage rates are normally distributed with a standard deviation of 0.6%. Compute 90% and 95% confidence intervals for the population mean 30-year fixed mortgage rate. Use Table 1. (Round intermediate calculations to 4 decimal places....
A simple random sample of 12 e-readers of a certain type had the following minutes of...
A simple random sample of 12 e-readers of a certain type had the following minutes of battery life. 287, 311, 262, 392, 313, 291, 350, 316, 286, 339, 314, 291 Assume that it is reasonable to believe that the population is approximately normal and the population standard deviation is 54. What is the upper bound of the 95% confidence interval for the battery life for all e-readers of this type? Round your answer to one decimal places (for example: 319.4)....
Question 4 A company has developed a new type of light bulb, and wants to estimate...
Question 4 A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 651 hours with a sample standard deviation of 43 hours. It is reasonable to believe that the population is approximately normal. Find the lower bound of the 95% confidence interval for the population mean lifetime of all bulbs manufactured by this new process. Round to the nearest integer....
Question 7 (4.2 points) A simple random sample of electronic components will be selected to test...
Question 7 (4.2 points) A simple random sample of electronic components will be selected to test for the mean lifetime in hours. Assume that component lifetimes are normally distributed with population standard deviation of 20 hours. How many components must be sampled so that a 99% confidence interval will have margin of error of 6 hours? Write only an integer as your answer. Question 8 (5 points) Six measurements were made of the mineral content (in percent) of spinach, with...
Question 16 (5 points) Following are interest rates (annual percentage rates) for a 30-year-fixed-rate mortgage from a sample of lenders in a certain city. It is reasonable to assume that the population is approximately normal. 4.327, 4.461, 4.547, 4.324, 4.365, 4.326 , 4.842 GP Find the upper bound of the 99% confidence interval for the mean rate.
Following are interest rates (annual percentage rates) for a 30- year-fixed-rate mortgage from a sample of lenders in a certain city. It is reasonable to assume that the population is approximately normal 4.327, 4.461, 4.547, 4.368,4.365, 4.422,4.842 Find the upper bound of the 99% confidence interval for the mean rate. Round to three decimal places (for example: 4.015). Write only a number as your answer. Do not write any units Your Answer: Answer Save Question 17 (5 points) In the...
Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from a sample of lenders in Macon, Georgia for one day. It is reasonable to assume that the population is approximately normal. 4.754 4.372 4.174 4.678 4.424 4.227 4.123 4.254 3.951 4.291 4.414 Send data to Excel Part: 0/2 Part 1 of 2 (a) Construct a 95% confidence interval for the mean rate. Round the answer to at least four decimal places. A 95% confidence...
Question 13 (5 points) Scientists want to estimate the mean weight of mice after they have been fed a special diet. From previous studies, it is known that the weight is normally distributed with standard deviation 5 grams. How many mice must be weighed so that a 95% confidence interval will have margin of error of 0.5 grams? Write only an integer as your answer. Your Answer: Answer Question 17 (5 points) In the computer game World of Warcraft, some...
2 Based on the confidence that the population standard deviation
of mortgage rates is greater than 0.7
olo Mortgage rates: Following are interest rates (annual percentage rates) for a 30-year fixed rate mortgage from a sample of lenders in Macon, Georgia, on June 20, 2013. Assume that the population is approximately normal. 4.286 4.325 4.134 4.581 4.908 4.429 4.689 3.319 4.84 4.568 4.847 4.996 Send data to Excel Part 1 of 3 (a) Find the sample standard deviation s. Round...
Exercise 8-7 Algo In order to estimate the mean 30-year fixed mortgage rate for a home loan in the United States, a random sample of 15 recent loans is taken. The average calculated from this sample is 7.85%. It can be assumed that 30-year fixed mortgage rates are normally distributed with a standard deviation of 0.6%. Compute 90% and 95% confidence intervals for the population mean 30-year fixed mortgage rate. Use Table 1. (Round intermediate calculations to 4 decimal places....
Question 7 (4.2 points) A simple random sample of electronic components will be selected to test for the mean lifetime in hours. Assume that component lifetimes are normally distributed with population standard deviation of 20 hours. How many components must be sampled so that a 99% confidence interval will have margin of error of 6 hours? Write only an integer as your answer. Question 8 (5 points) Six measurements were made of the mineral content (in percent) of spinach, with...
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