22. Assume we have two populations epresent the mercury contamination g/Km3) in two different European cities. The mean of mercury contamination in the irst city is 50 g/Km3 with standard

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Chapter1: Combinatorial Analysis
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Q2. Assume we have two populations
represent the mercury contamination
(g/Km3) in two different European cities.
The mean of mercury contamination in the
first city is 50 g/Km3 with standard
deviation of 1O, and mean of mercury
contamination in the second city is 40
g/Km3 with standard deviation of 8 g/Km3.
If a sample of n=9 is taken form first city and
a sample of n=16 is taken form second city,
what is the probability that the difference
between these two sample means is less
than 9 g/Km3?
0.0614
0.0359
0.3985
0.0992
0.6015
Transcribed Image Text:Q2. Assume we have two populations represent the mercury contamination (g/Km3) in two different European cities. The mean of mercury contamination in the first city is 50 g/Km3 with standard deviation of 1O, and mean of mercury contamination in the second city is 40 g/Km3 with standard deviation of 8 g/Km3. If a sample of n=9 is taken form first city and a sample of n=16 is taken form second city, what is the probability that the difference between these two sample means is less than 9 g/Km3? 0.0614 0.0359 0.3985 0.0992 0.6015
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