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

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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
Transcribed Image Text: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
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