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I want to know which of two manufacturing methods will be better. I create 10 prototypes using the first process, and 10 using the second. There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval using the plus four method for the difference in the proportion of defectives.

a.(-0.6204, 0.22037)

b.(-0.5555, 0.22214)

c. (-0.4930, 0.16001)

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