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Question 6

Most married couples have two or three personality preferences in common. A random sample

of 380 married couples found that 132 had three preferences in common. Another random sample of 568 couples showed that 238 had two personality preferences in common. Let p1 be the population proportion of all married couples who have three personality preferences in common. Let p2 be the population proportion of all married couples who have two personality preferences in common.

(a) Find a 95% confidence interval for p1 - p2. (Use 3 decimal places.)

lower limit-____________

upper limit___________


Question 5



A random sample of 372 married couples found that 300 had two or more personality preferences in common. In another random sample of 556 married couples, it was found that only 26 had no preferences in common. Let p1 be the population proportion of all married couples who have two or more personality preferences in common. Let p2 be the population proportion of all married couples who have no personality preferences in common.

(a) Find a 95% confidence interval for p1 - p2. (Use 3 decimal places.)

lower limit   ____________

 upper limit   ____________ 

Top Answer

Question 6 95% Confidence Interval P 1 - P 2 X 1 =132, n = 380, x 2 = 238, n 2 = 568 p 1 =132/380 =0.347 p 2 =238/568 =... View the full answer

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The solution is... View the full answer

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Question 6
Question 5
P , = 132 / 380 = 0 - 366
PI = 300/ 372 = 0. 806
P , = 238 / 568 = 0.419
12 = 26 / 656 = 0-047
h, = 380 , 12 = 568
n1 = 372 , 12 = 556
I value at 95% is
1 .96
x-value at 95%...

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