Independent random samples from two regions in the same area gave the fo chemical measurements (ppm). Assume the population distributions of the ch are mound-shaped and symmetric for these two regions. Region I: X1 , n1 = 12
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
![Independent random samples from two regions in the same area gave the following
chemical measurements (ppm). Assume the population distributions of the chemical
are mound-shaped and symmetric for these two regions.
Region I: X1 , n, = 12
1008 852 567 749 764 727 945 657 880 773 1023 1002
Region II: X2, n2 = 16
1070 750 879 836 711 1070 706 866 608 892 891 965 998 1089 852 443
Let H1 be the population mean for X1 and H2 be the population mean for X2 Find a
90% confidence interval for H1-42
O - 84.56 to 129.98
O - 87.63 to 133.05
O - 124.92 to 81.50
O - 129.98 to 84.56
O - 127.33 to 81.8](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F30984c9a-abd9-4d7b-8b62-780197767fd7%2F08cf2ada-3d92-439a-9d23-c646052abb89%2F4m8xucr_processed.jpeg&w=3840&q=75)
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