Question

An electrical component is designed to provide a mean service life of 4000 hours, with a...

An electrical component is designed to provide a mean service life of 4000 hours, with a standard deviation of 800 hours. A customer purchases a batch of 50 components; assume that this batch can be considered a simple random sample drawn from the large population of components. What is the probability that the mean life for the group of 50 components will be at least 3900 hours?

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

Homework Answers

Answer #1

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
1. Scores on an endurance test for cardiac patients are normally distributed with a mean of...
1. Scores on an endurance test for cardiac patients are normally distributed with a mean of 182 and a standard deviation of 24. What is the probability that a patient has a score below 190? 0.1306 0.6306 0.7487 0.3544 2. An electrical component is designed to provide a mean service life of 3000 hours with a standard deviation of 800 hours. The service life of the component is known to fillow a normal distribution. Batches of size 50 are taken....
The effective life of a component used in a jet-turbine aircraft engine is a random variable...
The effective life of a component used in a jet-turbine aircraft engine is a random variable with mean 5000 hours and standard deviation 40 hours. The distribution of effective life is fairly close to a normal distribution. The engine manufacturer introduces an improvement into the manufacturing process for this component that increases the mean life to 5050 hours and decreases the standard deviation to 30 hours. Suppose that a random sample of 16 components is selected from the old process...
1. Find the area under the standard normal curve (round to four decimal places) a. To...
1. Find the area under the standard normal curve (round to four decimal places) a. To the left of  z=1.65 b. To the right of z = 0.54 c. Between z = -2.05 and z = 1.05 2. Find the z-score that has an area of 0.23 to its right. 3. The average height of a certain group of children is 49 inches with a standard deviation of 3 inches. If the heights are normally distributed, find the probability that a...
1.A fair die is rolled once, and the number score is noted. Let the random variable...
1.A fair die is rolled once, and the number score is noted. Let the random variable X be twice this score. Define the variable Y to be zero if an odd number appears and X otherwise. By finding the probability mass function in each case, find the expectation of the following random variables: Please answer to 3 decimal places. Part a)X Part b)Y Part c)X+Y Part d)XY ——- 2.To examine the effectiveness of its four annual advertising promotions, a mail...
DRIVING ARI FLEET MANAGEMENT WITH REAL-TIME ANALYTICS Automotive Resources International, better known as simple ARI, is...
DRIVING ARI FLEET MANAGEMENT WITH REAL-TIME ANALYTICS Automotive Resources International, better known as simple ARI, is the world's largest privately-held company for vehicle fleet management services. ARI is headquartered in Mt. Laurel, New Jersey and has 2,500 employees and offices throughout North America, Europe, the UK and Hong Kong. The company manages more than 1,000,000 vehicles in the US, Canada, Mexico, Puerto Rico and Europe. Businesses that need vehicles for shipments (trucks, vans, cars, ships, and rail cars) may choose...
Question 1 2 pts Let x represent the height of first graders in a class. This...
Question 1 2 pts Let x represent the height of first graders in a class. This would be considered what type of variable: Nonsensical Lagging Continuous Discrete Flag this Question Question 2 2 pts Let x represent the height of corn in Oklahoma. This would be considered what type of variable: Discrete Inferential Distributed Continuous Flag this Question Question 3 2 pts Consider the following table. Age Group Frequency 18-29 9831 30-39 7845 40-49 6869 50-59 6323 60-69 5410 70...
We constantly seem to be pricing ourselves out of some markets and not charging enough in...
We constantly seem to be pricing ourselves out of some markets and not charging enough in others. Our pricing policy is pretty simple: we mark up our full manufacturing cost by 50%. That means a computer that costs us $2,000 to manufacture will sell for $3,000. Until now I thought this was a workable approach, but now I’m not so sure. Steve Works, CEO, Cortland Manufacturing, Inc. (CMI) Steve’s Controller, Sally Nomer, had just told him that she believed the...
When is a hypothesis considered scientific? a. when it is based on something other than observation...
When is a hypothesis considered scientific? a. when it is based on something other than observation b. when it can be tested and is refutable c. when it relies on anecdotal evidence d. when it relies on mystical explanations e. All hypotheses are considered scientific until experiments determine otherwise. 3. Of the following, which is the earliest step in the scientific process? a. generating a hypothesis b. analyzing data c. conducting an experiment d. drawing a conclusion e. developing a...
Delta airlines case study Global strategy. Describe the current global strategy and provide evidence about how...
Delta airlines case study Global strategy. Describe the current global strategy and provide evidence about how the firms resources incompetencies support the given pressures regarding costs and local responsiveness. Describe entry modes have they usually used, and whether they are appropriate for the given strategy. Any key issues in their global strategy? casestudy: Atlanta, June 17, 2014. Sea of Delta employees and their families swarmed between food trucks, amusement park booths, and entertainment venues that were scattered throughout what would...
The Business Case for Agility “The battle is not always to the strongest, nor the race...
The Business Case for Agility “The battle is not always to the strongest, nor the race to the swiftest, but that’s the way to bet ’em!”  —C. Morgan Cofer In This Chapter This chapter discusses the business case for Agility, presenting six benefits for teams and the enterprise. It also describes a financial model that shows why incremental development works. Takeaways Agility is not just about the team. There are product-management, project-management, and technical issues beyond the team’s control. Lean-Agile provides...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT