a) Does chocolate help heart-attack victims live longer? Researchers in Sweden randomly selected 1169 people who had suffered heart attacks and asked them about their consumption of chocolate in the previous year. Then the researchers followed these people and recorded whether or not they had died within 8 years. for goodness of fit, homogeneity or independence?

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Q: A social researcher decides to test whether an individual's age and their opinion on the…

A: Df: The number of rows is 4 and the number of columns is 3. Df =(r-1)(c-1) = (4-1)(3-1) = 6.

Q: A veterinarian wishes to compare the number of times race horses are reported to be lame during a…

A: Solution: Let x= Race and y= Jump  x y d=x-y (d-d) (d-d)2 7 2 5 4.3333 18.77749 8 1 7 6.3333…

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Q: A jar contains two white and three black balls. A sample of size 4 is made. What is the próbability…

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Q: 3. Which is the best estimate of O -18 O 9 O 18

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A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.