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The Numbers of Successes and the Sample Sizes Are Given x1=27,n1=38,x2=17,n2=38;80%\mathrm { x } _ { 1 } = 27 , \mathrm { n } _ { 1 } = 38 , \mathrm { x } _ { 2 } = 17 , \mathrm { n } _ { 2 } = 38 ; 80 \%

Question 78

Multiple Choice

The numbers of successes and the sample sizes are given for independent simple random samples from two populations.Use the two-proportions plus-four z-interval procedure to obtain the specified confidence interval.
- x1=27,n1=38,x2=17,n2=38;80%\mathrm { x } _ { 1 } = 27 , \mathrm { n } _ { 1 } = 38 , \mathrm { x } _ { 2 } = 17 , \mathrm { n } _ { 2 } = 38 ; 80 \% confidence interval


A) 0.1270.127 to 0.3730.373
B) 0.1130.113 to 0.3870.387
C) 0.0720.072 to 0.4280.428
D) 0.0990.099 to 0.4010.401

Correct Answer:

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