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 88 140 115 138 97 104 125 The confidence interval for the mean sales in all salesrooms, at a 99% level is: O (87.37, 157.96) O (96.63, 144.92) (92.51, 159.05) (97.19, 142.15)

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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):
140 115 138 97 104
The confidence interval for the mean sales in all salesrooms, at a 99% level is:
125 145 8
125
(87.37, 157.96)
(96.63, 144.92)
(92.51, 159.05)
(97.19, 142.15)
Transcribed Image Text: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): 140 115 138 97 104 The confidence interval for the mean sales in all salesrooms, at a 99% level is: 125 145 8 125 (87.37, 157.96) (96.63, 144.92) (92.51, 159.05) (97.19, 142.15)
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