Question

Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them...

Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of three holes. In a sample of 75 clamps, the mean time to complete this step was 50.1 seconds. Assume that the population standard deviation is σ = 10 seconds.

a. Consruct a 95% confidence interval for the mean time needed to complete this step.

b. Find the sample size needed so that a 98% confidence interval will have margin of error of 1.5.

Homework Answers

Answer #1

a)

b)

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them...
Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of three holes. In a sample of 75 clamps, the mean time to complete this step was 56.8 seconds. Assume that the population standard deviation is =σ  10 seconds. Round the critical value to no less than three decimal places. (a) Construct a 99% confidence interval for the...
Efficiency experts study the processes used to manufacture items in order to make them as efficient...
Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of 3 holes. In a sample of 74 clamps the mean to complete this step was 53.6 seconds. Assume that the population standard deviation is 6 seconds. What is the lower bound of the 98% confidence interval. Round your answer to one decimal place
Question 1 (1 point) Suppose that a sample of size 60 is drawn from a population...
Question 1 (1 point) Suppose that a sample of size 60 is drawn from a population with mean 88 and standard deviation 61 . Find the value of , the mean of the distribution of sample means. Wrtie only a number as your answer. Your Answer: Question 2 (1 point) Suppose that a sample of size 68 is drawn from a population with mean 64 and standard deviation 46 . Find the value of , the standard deviation of the...
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