Question: A set of n = 30 components arc tested and their average lifetime is = 132.4 hours. (a) If the lifetimes are modeled with

A set of n = 30 components arc tested and their average lifetime is = 132.4 hours.
(a) If the lifetimes are modeled with an exponential distribution, construct a 99% confidence interval for the mean time to failure.
(b) The components are advertised as having "an average lifetime of at least 150 hours." Do you think that this is a plausible claim?

Step by Step Solution

★★★★★

3.40 Rating (156 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a With X 2 600005 91952 and X 2 600995 3... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

943-M-S-P (9756).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

The capacitances of certain electronic components have a normal distribution with a mean = 174 and a standard deviation = 2.8. If an engineer randomly selects a sample of n = 30 components and...

Ninety identical electrical circuits are monitored at an extreme temperature to see how long they last before failing. The 50th failure occurs after 263 minutes. If the failure times are modeled with...

The failure times in hours of n = 20 identical electrical circuits subjected to an intense vibration are given in DS 17.3.1. (a) If the failure times are modeled with an exponential distribution,...

U.S. Copyright Law (title 17 of U.S. code) governs the reproduction and redistribution of copyrighted material. Downloading this document for the purpose of redistribution is prohibited. Chapter 15...

1. A player throws a fair die and simultaneously flips a fair coin. If the coin lands heads, then she wins twice, and if tails, then one-half of the value that appears on the die. Determine her...

1 . Geoff is the proud owner of a restaurant. Recently he read an article in Food Weekly which stated that the population mean preparation time for food at popular restaurants is equal to 22 minutes....

Attempt 5 Written: Apr 20, 2017 2:05 PM - Apr 20, 2017 2:40 PM Submission View Your quiz has been submitted successfully. Mixed n1 1 / 1 point A poll of 100 Canadians asked whether marijuana should...

1 2 3 4 7 8 9 12 13 14 15 16 17 18 19 20 21 22 23 24 28 29 30 31 38 40 41 44 47 48 49 50 51 62 63 64 66 67 68 69 70 71 73 74 76 77 78 79 80 81 82 85 86 87 88 89 90 91 92 93 94 95 99 100 101 104 105...

Exercises Chapter 2 2.1 Marginal and conditional probability: The social mobility data from Section 2.5 gives a joint probability distribution on (Y1 , Y2 )= (father's occupation, son's occupation)....

Construction Helicopters paid Heli-Dyne Systems $315,000 for three helicopters that were in Argentina. Two were ready to fly, and one was disassembled for routine maintenance. The contract said...

1. What are the ethical and social issues in this case? 2. Why should Nike be held responsible for what happens in factories that it does not own? Does Nike have a responsibility to ensure that...

Consider a variant of the tree protocol called the forest protocol. The database is organized as a forest of rooted trees. Each transaction Ti must follow the following rules: The first lock in each...

16.13 Bootstrap t confidence interval for average audio file length. Return to or create the bootstrap distribution resamples on the sample mean for the audio file lengths in Exercise 16.8. In...

In 1995, France implemented a law making the use of the French language mandatory in certain legal documents. Documents such as prospectuses (for securities offeringssee Chapter 10) and warranties...

The accompanying table shows the incidence of malaria and two other similar illnesses. If a person lives in an area affected by all three diseases, what is the probability that he or she will develop...

A device has three components and works as long as at least one of the components is functional. The reliabilities of the components are 0.96, 0.91, and 0.80. What is the probability that the device...

In 2003, there were 5,732 deaths from car accidents in France. The population of France is 59,625,919. If I am going to live in France for five years, what is my probability of dying in a car crash?

Round to the nearest Cent. Acme Annuities recently offered an annuity that pays 4.2% compounded monthly. What equal monthly deposit should be made into this annuity in order to have $145,000 in 8...

One year ago, your company purchased a machine used in manufacturing for $105,000. You have learned that a new machine is available that offers many advantages and that you can purchase it for...

Based on the outcomes in the following table, choose which of the statements below is (are) correct? Scenario Security A Security B Security C Recession Return > E(r) Return = E(r) Return