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what is the solution The monthly sales of cars (in L.L) in a show rooms for a company are assumed to follow a normal distribution.

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The monthly sales of cars (in L.L) in a show rooms for a company are assumed to follow a normal distribution. A sample of monthly sales has been observed, and given as (in Millions of L.L): 125 145 88 150 115 138 97 104 125 The confidence interval for the mean sales in all salesrooms, at a 99% level is: (92.51, 159.05) O (87.37, 157.96) (97.19, 142.15) O (96.63, 144.92)

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