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# i do not know how to solve this alt="E36D2867-2E1A-4BF8-B4F3-2184460D6008.jpeg" /> ATTACHMENT PREVIEW Download attachment E36D2867-2E1A-4BF8-B4F3-2184460D6008.jpeg 2. (5’) A manufacturer claims that a certain brand of VCR player has an average life expectancy of 5 years and 6 months with a standard deviation of 1 year and 6 months. Assume that the life expectancy is normally distributed. (a) Selecting one VCR player from this brand at random, calculate the probability of its life expectancy exceeding 7 years. (b) The Critical Consumer magazine decides to test ﬁfty VCRS of this brand. The average life in this sample is 6 years and the sample standard deviation is 2 years. Calculate a 99% conﬁdence interval for the average life. (0) How many more VCRs would the magazine have to test in order to halve the width of the conﬁdence interval

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