Question

Historical data indicated that the time required to service the conveyor belt at Coca-Cola Amatil's Richlands...

Historical data indicated that the time required to service the conveyor belt at Coca-Cola Amatil's Richlands operations can be modelled as a normal distribution with a standard deviation of 15.7 minutes. A random sample of 27 services revealed a mean service duration of 122.1 minutes. Determine a 90% confidence interval for the mean service time in minutes. State the lower bound of this interval correct to two decimal places.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Solution: Here concept of confidence interval for population mean is used.

Please rate the answer. Thank you.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A consumer group claims that wireless companies are worsening their customer service, with the time customers...
A consumer group claims that wireless companies are worsening their customer service, with the time customers are kept on hold when contacting the company reaching an average of 4.4 minutes. You collect data on 40 random customer service calls and find that the sample mean time a customer is kept on hold is 4.5 minutes and standard deviation is 51 seconds (0.85 minutes). Develop a 95% confidence interval for the mean time customers are kept on hold. Upper Bound: 4.79,...
The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870...
The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9460 observations, the sample mean interval was x1 = 62.6 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 23,000...
The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870...
The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9800 observations, the sample mean interval was x1 = 64.4 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 24,404...
The following data represent the commute time​ (in minutes) x and a score on a​ well-being...
The following data represent the commute time​ (in minutes) x and a score on a​ well-being survey y. The equation of the​ least-squares regression line is ModifyingAbove y with caret equals negative 0.0522 x plus 69.3800 and the standard error of the estimate is 0.3295. Complete parts ​(a) through ​(e) below.    x 10 20 30 40 55 77 110    y 69.0 68.3 67.9 67.1 66.1 65.9 63.5 ​(a) Predict the mean​ well-being index composite score of all individuals whose commute...
“Fana Lube” is a regional chain that provides a standard service for performing oil changes and...
“Fana Lube” is a regional chain that provides a standard service for performing oil changes and basic checkups on automobiles. The chain has a standard that says the average time per car for this service should be 15 minutes. There is considerable variability in times due to differences in layout of engines, degree of time pressure from other jobs, and many other sources. As a result, the management of the chain decided to study if the standard is being met...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT