Characterize the lifetime of a new brand

Reference no: EM131001668

LIFE TESTS FOR ENERGY-SAVING LIGHT BULBS

To characterize the lifetime of a new brand of energy-saving light bulbs, a sample of 10 were tested in a specially designed facility where they could be left on continuously and monitored electronically to record the precise number of hours until burn out. The experimental design calls for halting the test immediately after 8 of the 10 light bulbs have burned out. The result, in thousands of hours, arranged in increasing order is as follows:

(1.599, 3.380, 5.068, 8.478, 8.759, 9.256, 11.475, 14.382)

i.e., the ?rst light bulb to burn out did so after 1,599 hours, the next after 3,380 hours, and the 8th and ?nal one after 14,382 hours. Obtain an estimate of the mean lifetime and test the hypothesis that it is 12,000 hours against the alternative that it is not.

Reference no: EM131001668

Questions Cloud

Identify the customer''s key issues : Write a one-half page office memo (sample on page 375) to your co-workers outlining the campaign.

What kinds of information would you collect : What kinds of information would you collect to address problems such as drugs, prostitution, and vandalism? What kinds of responses might be considered

Record of measurements determined over ?rst hour : The data in Table 22.1 is a record of the measurements determined over the ?rst hour of a shift. Obtain an X-bar chart and identify whether or not the manufacturing process is "in-control".

Determine a sampling plan : Determine a sampling plan to meet these objectives with an α-risk of 0.05 and a β-risk of 0.1. Plot the resulting OC curve.

Characterize the lifetime of a new brand : To characterize the lifetime of a new brand of energy-saving light bulbs, a sample of 10 were tested in a specially designed facility where they could be left on continuously and monitored electronically to record the precise number of hours unti..

At what total amount did the shares sell to the public : At what total amount did the shares sell to the public? How is the difference between this amount and the $50.2 million net proceeds accounted for?

Find probability that premiums collected will be sufficient : Find E(L), Var(L), Var(1L). Find the probability that, for a given contract, the premiums collected will be sufficient to pay the benefits.

Quality and performance improvement analysis paper : Write an analysis of (750-1,000 words) on quality and performance improvement in health care. Prepare this assignment according to the APA guidelines found in the APA Style Guide, located in the Student Success Center. An abstract is not required

What information does your calculation provide an investor : Calculate the return on shareholders' equity for AGF. The average return for the stocks listed on the New York Stock Exchange in a comparable period was 18.8%. What information does your calculation provide an investor?

User Account

All Pages