The contingency table shows a randorm sampl At ?=0.10, can you conclude that the

Question

The contingency table shows a randorm sampl At ?=0.10, can you conclude that the subject matter and coauthorship Coauthored are related? Complete Internationally coauthored parts (a) through (d) le of engineering, psychology, and biology articles and if and how they were coauthored ma Engineering Psychology Biolo 49 19 34 42 15 41 29 43 Not coauthored (a) Identify the claim and state the null and alternative hypotheses. Ho Coauthorship and subject matter are independent Ha Coauthorship and subject matter are dependent The alternmative hypothesis is the claim. (b) Determine the degrees of freedom, find the critical value, and identify the rejection region. Calculate the degrees of freedom. Find the critical value. x (Round to three decimal places as needed ) Which region below is the correct rejection region? Click to select your answer(s)

Explanation / Answer

A)

Ho: coauthorship and subject are independent of each other

H1: coauthorship and subject are dependent of each other

The alternative hypothesis is the claim

B)

Degrees of freedom = (r-1)*(c-1) = 2*2 = 4

Critical value = =CHISQ.INV.RT(0.05,4) = 9.488

Rejection region: Chisq > chisq(0)

Chi square = sum(Oi-Ei)^2/Ei = 4.9035

P value = 0.2973

fail to reject Ho and conclude that coauthorship and subject are dependent of each other.

Observed Frequencies Column variable Row variable engg psychology biology Total coauthored 44 42 49 135 internationally coauthored 29 15 19 63 no coauthored 43 41 34 118 Total 116 98 102 316

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