Homework Answers
Given,
n=80, sample mean=
=$148
Now,
The best point estimate for the mean monthly electric bill for all residents of the local apartment complex
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The mean monthly electric bill for 80 residents of the local apartment complex is $148. What...
The mean monthly electric bill for 49 residents of the local apartment complex is $68. What...
The mean monthly electric bill for 49 residents of the local apartment complex is $68. What is the best point estimate for the mean monthly electric bill for all residents of the local apartment complex?
1) NASA is conducting an experiment to find out the fraction of people who black out...
1) NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6. In an earlier study, the population proportion was estimated to be 0.43. How large a sample would be required in order to estimate the fraction of people who black out at 6 or more Gs at the 80% confidence level with an error of at most 0.04? Round your answer up to the next integer. 2) Consider the...
(18) You own an apartment complex with 40 units. All units are occupied. The monthly rent...
(18) You own an apartment complex with 40 units. All units are occupied. The monthly rent for 15 units is $1,100 per unit, and the monthly rent of the other 25 units is $1,400 per unit. The total maintenance cost is $3,000 per month for the entire complex. The property tax is $200 per month for the entire complex. Assume there are no other costs and also no changes in the rent, the maintenance cost, and the tax. The units...
The water works commission needs to know the mean household usage of water by the residents...
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.9 gallons. The mean water usage per family was found to be 16.5 gallons per day for a sample of 1000 families. Construct the 98% confidence interval for the mean usage of water. Round your answers to one decimal place. Answer low to Enter) 1 Point m Tables Keypad...
alle Electric bills: According to a government energy agency, the mean monthly household electricity bill in...
alle Electric bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.72. Assume the amounts are normally distributed with standard deviation $24.00. (a) What proportion of bills are greater than $1317 (b) What proportion of bills are between $87 and 51407 (c) What is the probability that a randomly selected household had a monthly bill less than $1257 Round the answers to at least four decimal places. Part: 0/3...
A local electric company charges a base fee of $8 per month. They charge an additional...
A local electric company charges a base fee of $8 per month. They charge an additional $0.1125 per kilowatt hour of electricity used. Use this information to answer the following. When you type in your answers, make sure to type the A, B, C, etc. so I know which answer goes to which part of the question. A. Write an equation to represent the total cost a customer will pay for their electric service. Let C represent the total monthly...
A supervisor records the repair cost for 17 randomly selected TVs. A sample mean of $57.20...
A supervisor records the repair cost for 17 randomly selected TVs. A sample mean of $57.20 and standard deviation of $26.41 are subsequently computed. Determine the 80% confidence interval for the mean repair cost for the TVS. Assume the population is approximately normal. Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. Answer/How to Enter) 2 Points Tables Keypad Keyboard Shortcuts A supervisor records the...
What is demand leveling? How would achieving better leveling help reduce the monthly electric bill in...
What is demand leveling? How would achieving better leveling help reduce the monthly electric bill in a typical commercial building?
A consumer group wants to estimate the mean electric bill for the month of April for...
A consumer group wants to estimate the mean electric bill for the month of April for single-family homes in a large city. Based on studies conducted for other cities, the standard deviation is assumed to be $24. The group wants to estimate, with 99% confidence, the mean bill for April to within $4 a. What sample size is needed? b. If 95% confidence is desired, how many homes need to be selected? Click the icon to view a table of...
If a sample has a mean of 101 and a standard deviation of 16, what is...
If a sample has a mean of 101 and a standard deviation of 16, what is the value in the data set that corresponds to z score of 2? Select the best answer. Answer 10 Points m Tables Keypad 0133 0113 97 116
(18) You own an apartment complex with 40 units. All units are occupied. The monthly rent for 15 units is $1,100 per unit, and the monthly rent of the other 25 units is $1,400 per unit. The total maintenance cost is $3,000 per month for the entire complex. The property tax is $200 per month for the entire complex. Assume there are no other costs and also no changes in the rent, the maintenance cost, and the tax. The units...
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.9 gallons. The mean water usage per family was found to be 16.5 gallons per day for a sample of 1000 families. Construct the 98% confidence interval for the mean usage of water. Round your answers to one decimal place. Answer low to Enter) 1 Point m Tables Keypad...
alle Electric bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.72. Assume the amounts are normally distributed with standard deviation $24.00. (a) What proportion of bills are greater than $1317 (b) What proportion of bills are between $87 and 51407 (c) What is the probability that a randomly selected household had a monthly bill less than $1257 Round the answers to at least four decimal places. Part: 0/3...
A local electric company charges a base fee of $8 per month. They charge an additional $0.1125 per kilowatt hour of electricity used. Use this information to answer the following. When you type in your answers, make sure to type the A, B, C, etc. so I know which answer goes to which part of the question. A. Write an equation to represent the total cost a customer will pay for their electric service. Let C represent the total monthly...
A supervisor records the repair cost for 17 randomly selected TVs. A sample mean of $57.20 and standard deviation of $26.41 are subsequently computed. Determine the 80% confidence interval for the mean repair cost for the TVS. Assume the population is approximately normal. Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. Answer/How to Enter) 2 Points Tables Keypad Keyboard Shortcuts A supervisor records the...
A consumer group wants to estimate the mean electric bill for the month of April for single-family homes in a large city. Based on studies conducted for other cities, the standard deviation is assumed to be $24. The group wants to estimate, with 99% confidence, the mean bill for April to within $4 a. What sample size is needed? b. If 95% confidence is desired, how many homes need to be selected? Click the icon to view a table of...
If a sample has a mean of 101 and a standard deviation of 16, what is the value in the data set that corresponds to z score of 2? Select the best answer. Answer 10 Points m Tables Keypad 0133 0113 97 116
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