A national air traffic control system handled an average of 47,134 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,238 flights per day.
a. Construct a 99?% confidence interval to estimate the average number of flights per day handled by the system.The 99?% confidence interval to estimate the average number of flights per day handled by the system is from a lower limit of __ to an upper limit of __.
?
A national air traffic control system handled an average of 47,134 flights during 29 randomly selected...
A national air traffic control system handled an average of 47,594 flights during 28 randomly selected days in a recent year. The standard deviation for this sample is 6,441 flights per day. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the average number of flights per day handled by the system. to an upper limit of The 99% confidence interval to estimate the average number of flights per day handled by the system is...
A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (The ship certainly doesn't want to run out of beer in the middle of the ocean!) The average beer consumption over 24 randomly selected seven-day cruises was 81,689 bottles with a sample standard deviation of 4,574 bottles. a. Construct a 99% confidence interval to estimate the average beer consumption per cruise. The 99% confidence interval to estimate the average...
A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (The ship certainly doesn't want to run out of beer in the middle of the ocean!) The average beer consumption over 15 randomly selected seven-day cruises was 81,784 bottles with a sample standard deviation of 4,549 bottles. A. Construct a 99% confidence interval to estimate the average beer consumption per cruise The 99% confidence interval to estimate the average...
A community health association is interested in estimating the average number of maternity days women stay in the local hospital. A random sample is taken of 16 women who had babies in the hospital during the past year. The following numbers of maternity days each woman was in the hospital are rounded to the nearest day. 1 7 5 Use these data and a population standard deviation of 1.25 to construct a 98% confidence interval to estimate the average maternity...
part b: what is the margin of error for this interval? Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 44 customers paid an average foe of $12.16 per month on their interest-bearing checking accounts. Assume the population standard deviation is $1.87. Complete parts a and b below. a. Construct a 99% confidence interval to estimate the average foo for the population The 90% confidence...
Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 32 customers paid an average fee of $12.11 per month on their interest-bearing checking accounts. Assume the population standard deviation is $1.65 Complete parts a and b below. a. Construct a 90% confidence interval to estimate the average fee for the population.The 90% confidence interval has a lower limit of blank and an upper limit of....
Also, need Margin of error. Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 44 customers paid an average fee of $11.53 per month on their interest-bearing checking accounts. Assume the population standard deviation is $1.61. Complete parts a and b below. a. Construct a 95% confidence interval to estimate the average fee for the population. The 95% confidence interval has a lower limit of...
part b: What assumptions need to be made about this population ? A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (The ship certainly doesn't want to run out of beer in the middle of the oceanl) The average beer consumption over 19 randomly selected seven-day cruises was 81,911 bottles with a sample standard deviation of 4,513 bottles. Complete parts a and b below a. Construct a 95%...
A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (The ship certainly doesn't want to run out of beer in the middle of the ocean!) The average beer consumption over 21 randomly selected seven-day cruises was 81785 bottles with a sample standard deviation of 4,544 bottles. Complete parts a and b below. a. Construct a 80% confidence interval to estimate the average beer consumption per cruise. The 80%...
The number of cups of coffee served at a local Tim Horton’s during the morning rush hour between 7 and 9 AM is normally distributed. Based on sales a day is described as SLOW if less than 200 cups are served, AVERAGE 200- 249 cups are sold, and BUSY if over 250 cups are sold during the day. A random sample of five days was taken and the sales figures observed. The sample mean is 208 cups and the sample...