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In: Statistics and Probability

In addition to knowing a person's blood type, it is important to also know whether their...

In addition to knowing a person's blood type, it is important to also know whether their Rh factor is positive or negative. The blood types of the first 200 individuals to have their blood drawn at a hospital lab on Monday are recorded below.

Type
Rh Factor A B AB O
Positive 61 14 19 75
Negative 9 8 8 15

Given:

H0: Rh factor and blood types are independent.
Ha: Rh factor and blood types are dependent.    

Find:

Find the test statistic. (Round your answer to two decimal places.)

Χ2 = ??

Find the rejection region. (Round your answer to two decimal places.)

Χ2 > ??

Given: H0 is rejected. There is sufficient evidence to conclude that Rh factor and blood types are dependent.

FInd:

Calculate the proportion of Rh negative blood types within each of the A, B, AB, and O categories. (Round your answers to three decimal places.)

p̂A= ??

p̂B= ??

p̂AB= ??

p̂O= ??

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