A 95% confidence interval for the mean price of a gallon of 93 octane gasoline in...
A 95% confidence interval for the mean price of a gallon of 93 octane gasoline in the state of Georgia is found to be $2.60 to $2.78. The best interpretation of this interval is...
Homework Answers
We are 95% confident that the mean price of octane in the state of Georgia is between $2.60 to $2.78
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A 95% confidence interval for the mean price of a gallon of 93
octane gasoline in...
Suppose you are told that a 95% confidence interval for the average price of a gallon...
Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $2.93 to $4.21. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.) x = $ E = $
Suppose you are told that a 95% confidence interval for the average price of a gallon...
Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $2.91 to $4.40. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.) x = $ E = $
Suppose you are told that a 95% confidence interval for the average price of a gallon...
Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $3.06 to $4.06. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.) x = $ E = $
An automobile club reported that the average price of regular gasoline in a certain state was...
An automobile club reported that the average price of regular gasoline in a certain state was $2.61 per gallon. The following data show the price per gallon of regular gasoline for 15 randomly selected stations in the state. Complete parts a through c below. 2.64 2.72 2.53 2.65 2.57 2.69 2.62 2.51 2.65 2.63 2.56 2.51 2.66 2.62 2.65 a. Construct a 99% confidence interval to estimate the average price per gallon of gasoline in the state. The 99% confidence...
Find a 95% confidence interval for the proportion of gasoline stations with at least one leaking...
Find a 95% confidence interval for the proportion of gasoline
stations with at least one leaking underground tank. Round the
answers to three decimal places.
The 95% confidence interval is ( , ).
How many stations must be sampled so that a 95% confidence
interval specifies the proportion to within ±0.05? (Round up the
final answer to the nearest integer.)
Required information Leakage from underground fuel tanks has been a source of water pollution. In a random sample of 91 gasoline stations,...
and the standard normal table to find a 95% two-sided confidence interval on mean. 3. By...
and the standard normal table to find a 95% two-sided confidence interval on mean. 3. By using a statistical software, namely MATLAB, the random sample from a normal distribution is generated as given below: 9.11 9.55 10.30 9.39 10.49 10.73 12.77 9.80 7.86 a) (10 Points) Calculate the sample mean and sample variance. b) (10 Points) Find a 95% two-sided confidence interval on mean. Provide a practical interpretation of this interval c) (10 Points) Find a two-sided confidence interval on...
Question of 41 1.0 Points A 95% confidence interval for the true mean cholesterol level of...
Question of 41 1.0 Points A 95% confidence interval for the true mean cholesterol level of adult males based on 25 randomly selected subjects extends from 175 mg 1 to 250 mg L. What is a proper interpretation of the confidence interval? A Ninety-five percent of the population has a cholesterol level between 175 and 250 m l B. We are 95% confident that the true mean cholesterol level of the population falls between 175 and 250 mgt C. More...
The U.S. Energy Administration reported that the mean price for a gallon of regular gasoline in...
The U.S. Energy Administration reported that the mean price for a gallon of regular gasoline in the U.S, was $2.357. You are asked to test at a 06 level of significance whether the mean price for a gallon of gasoline in the Lower Atlantic states is different from the national mean. You sample 50 service stations in the Lowe determined the mean price for a gallon of regular gasoline was $2.343. The standard deviation for all stations in the lower...
An automobile club reported that the average price of regular gasoline in a certain state was...
An automobile club reported that the average price of regular gasoline in a certain state was $2.62 per gallon. The following data show the price per gallon of regular gasoline for 15 randomly selected stations in the state. Complete parts a through c below. 2.71 2.53 2.69 2.75 2.73 2.53 2.57 2.56 2.72 2.63 2.51 2.52 2.53 2.69 2.67 a. Construct a 99% confidence interval to estimate the average price per gallon of gasoline in the state. The 99% confidence...
Suppose the price of regular octane gasoline were 20 cents per gallon higher in New Jersey...
Suppose the price of regular octane gasoline were 20 cents per gallon higher in New Jersey than in Oklahoma. Do you think there would be an opportunity for arbitrage (i.e., that firms could buy gas in Oklahoma and then sell it at a profit in New Jersey)? Why or why not?
Find a 95% confidence interval for the proportion of gasoline
stations with at least one leaking underground tank. Round the
answers to three decimal places.
The 95% confidence interval is ( , ).
How many stations must be sampled so that a 95% confidence
interval specifies the proportion to within ±0.05? (Round up the
final answer to the nearest integer.)
Required information Leakage from underground fuel tanks has been a source of water pollution. In a random sample of 91 gasoline stations,...
and the standard normal table to find a 95% two-sided confidence interval on mean. 3. By using a statistical software, namely MATLAB, the random sample from a normal distribution is generated as given below: 9.11 9.55 10.30 9.39 10.49 10.73 12.77 9.80 7.86 a) (10 Points) Calculate the sample mean and sample variance. b) (10 Points) Find a 95% two-sided confidence interval on mean. Provide a practical interpretation of this interval c) (10 Points) Find a two-sided confidence interval on...
Question of 41 1.0 Points A 95% confidence interval for the true mean cholesterol level of adult males based on 25 randomly selected subjects extends from 175 mg 1 to 250 mg L. What is a proper interpretation of the confidence interval? A Ninety-five percent of the population has a cholesterol level between 175 and 250 m l B. We are 95% confident that the true mean cholesterol level of the population falls between 175 and 250 mgt C. More...
The U.S. Energy Administration reported that the mean price for a gallon of regular gasoline in the U.S, was $2.357. You are asked to test at a 06 level of significance whether the mean price for a gallon of gasoline in the Lower Atlantic states is different from the national mean. You sample 50 service stations in the Lowe determined the mean price for a gallon of regular gasoline was $2.343. The standard deviation for all stations in the lower...
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