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Engineering · Mechanical Engineering
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03) (6+6-12 marks) Parta)(4+2-6 marka) In a random sample of n 50 families owning television sets in the city of Amman, Jordan, it is found that x 34 subscribe to HBO service. l- Find that subscribe to HBO service. 90% confidence interval for the true proportion of families with television sets in this city Ifp is used as an estimate ofp, can we be 90% confident that the error will not exceed 0.04 Part (bE (6 marks) The weights, in decagrams, of a sample of 10 packages of grass seed distributed by ertain company: yielded a sample mean of 46.12 and a variance of 0.286 . Find a SS% confidence inten for the true standard deviation of the weights of all such packages of grass seed distribated by this compar assuming a normal population.

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