The contingency table shows a random sample of engineering, psychology, and biol

Question

The contingency table shows a random sample of engineering, psychology, and biology articles and if and how they were coauthored At alpha = 0.05, can you conclude that the subject matter and coauthorship are related? Complete parts (a) through (d). (a) Identify the claim and state the null and alternative hypotheses. H_0: Coauthorship and subject matter are independent. H_a: Coauthorship and subject matter are dependent. The alternative hypothesis is the claim. (b) Determine the degrees of freedom, find the critical value, and identify the rejection region. Calculate the degrees of freedom. d.f. =

Explanation / Answer

Degrees of freedom = (Row - 1) * (Column - 1)

Here,

Rows = 3

Columns = 3

Hence,

Degrees of freedom = (3 - 1)*(3 - 1) = 2*2 = 4

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