Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.30 gallons. From his records, he selects a random sample of 70 sales and finds the mean number of gallons sold is 6.20.
The owner of Britten’s Egg Farm wants to estimate the mean number of eggs produced per chicken. A sample of 18 chickens shows they produced an average of 23 eggs per month with a standard deviation of 7 eggs per month.
What is the best estimate of this value?
For a 98% confidence interval, what is the value of t? (Round your answer to 3 decimal places.)
1) a) Point estimate = sample mean = 6.2
b) Z for 90% confidence interval = Z0.05 = 1.645
confidence interval
= (5.75 , 6.65)
2) df = 18 - 1 = 17
t score for 98% confidence interval = t0.01,17 = 2.567
confidence interval
= (18.76 , 27.24)
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.50 gallons. From his records, he selects a random sample of 70 sales and finds the mean number of gallons sold is 7.80. What is the point estimate of the population mean? (Round your answer to 2 decimal places.)...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.30 gallons. From his records, he selects a random sample of 70 sales and finds the mean number of gallons sold is 5.70. a. What is the point estimate of the population mean? (Round your answer to 2 decimal...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.30 gallons. From his records, he selects a random sample of 70 sales and finds the mean number of gallons sold is 8.40. What is the point estimate of the population mean? (Round your answer to 2 decimal places.)...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.50 gallons. From his records, he selects a random sample of 45 sales and finds the mean number of gallons sold is 8.30. a. What is the point estimate of the population mean? (Round your answer to 2 decimal...
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.80 gallons. From his records, he selects a random sample of 80 sales and finds the mean number of gallons sold is 6.70. A)What is the point estimate of the population mean? (Round your answer to 2 decimal places.)...
Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.80 gallons. From his records, he selects a random sample of 60 sales and finds the mean number of gallons sold is 8.10. a. What is the point estimate of the population mean? (Round your answer to 2 decimal...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his customers. Assume the number of litres sold follows the normal distribution with a standard deviation of 28 L. From his records, he selects a random sample of 23 sales and finds the mean number of litres sold is 71. a. What is the point estimate of the population mean? (Round the final answer to the...
Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his customers. Assume the number of litres sold follows the normal distribution with a standard deviation of 6 L. From his records, he selects a random sample of 12 sales and finds the mean number of litres sold is 38. a. What is the point estimate of the population mean? (Round the final answer to the...
Please check my answers. I'd like to know if I did them correctly. Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of galions sold follows the normal distribution with a population standard deviation of 1.80 gallons. From his records, he selects a random sample of 60 sales and finds the mean number of gallons sold is 8.10. e. What is...
1) The owner of a local gas station would like to estimate the mean number of gallons sold to his customers. Assume that the number of gallons sold follow a normal distribution with a population standard deviation 0f 2.5 gallons. He selects a random sample of 100 sales and finds the mean number of gallons sold equals 9.2 What is the point estimate of the population mean? a. 8.2 b. 2.5 c. 100 d. 9 2) The owner of a...