Answer to Question #97843 in Statistics and Probability for Muhammad

Question

A company manufactures light bulbs and advertises that 60watts bulbs burn for an average of 800hours before failing. In reaction to the company's advertisement, several dissatisfied customers have complained that the company's claim is exaggerated the company decided to carry out experiments on 100 bulbs. In this experiment, the bulbs burns for an average of 745.1 hours before failing and S.D of 238 hours

A. Find the probability that the bulb will have an average life of at least 775 hours. Showing the computer output.
B. If 500 bulbs were selected, approximately how many will have an average of 775 hours
C. Formulate the null and alternative hypothesis appropriate for this situation.
D. What test statistic is appropriate for testing the hypothesis above.
E. At alpha= 0.05 is the company's claim truly exaggerated? Show the computer output
All answers should be done on R

Answer 1

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