Q4a) The company which produce light bulb claims that the mean lifetime of their light bulbs is 1600 hours. To test it claim, the companytook a random sample of 6 light bulbs and the following results wereobtained:1640,1635,1580,1533,1630,1690(i) Compute the sample mean and the sample variance.(ii) Is there any evidence that support company claim at 10%level of significance?(iii) Find the 90% confidence interval for the mean life time of alight bulb.a) The weights of bags of sugar from a production line are normallydistributed with a mean of 500g and standard deviation of 2g. A bagis selected at random, what is the probability that :(i) It will have a weight between 498g and 502g?(ii) It will have a weight of more than 505g?

The mean lifetime of light bulbs is 1600 hours.Sample size Sample data: 1640, 1635, 1580, 1533,…

Answered: a) The company which produce light bulb…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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