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 beer consumption per cruise is from a lower limit of___ bottles to an upper limit of ___ bottles.
B. What's the margin of error?
Solution :
t
/2,df = 2.977
Margin of error = E = t/2,df
* (s /
n)
= 2.977 * (4549 /
15)
Margin of error = E = 3497
The 95% confidence interval estimate of the population mean is,
- E <
<
+ E
81784 - 3497 <
< 81784 + 3497
78287 <
< 85281
(78287 , 85281)
Lower limit = 78287
Upper limit = 85281
A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-...
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 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%...
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 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 47,594 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...
As part of a research program for a new cholesterol drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL (low-density lipoprotein) cholesterol of men. The following data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 31-year-old man. Click the icon to view the datatable Determine the upper and lower limits of the confidence interval UCL-...
A) A certain region would like to estimate the proportion of voters who intend to participate in upcoming elections. A pilot sample of 25 voters found that 17 of them intended to vote in the election. Determine the additional number of voters that need to be sampled to construct a 95% interval with a margin of error equal to 0.06 to estimate the proportion. The region should sample ____ additional voters. B) Determine the sample size needed to construct a...
Q4) A national air traffic control system handled an average of 47,665 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,208 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. The 99% confidence interval to estimate the average number of flights per day handled by the system is from a lower limit...
As part of a research program for a new cholesterol drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL (low-density lipoprotein) cholesterol of men. The following data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 29-year-old man. Click the icon to view the data table. Determine the upper and lower limits of the confidence interval...
As part of a research program for a new cholesterol drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL (low-density lipoprotein) cholesterol of men. The following data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a 95% confidence interval to estimate the average LDL cholesterol level of a 31-year-old man. 囲Click the icon to view the data table. Determine the upper and lower limits of the confidence interval....