Find the critical value to test the claim for the given contingency table. The m

Question

Find the critical value to test the claim for the given contingency table.
The manager of an assembly process wants to determine if the number of defective products
is independent of the day of the week. Find the critical value needed to test the claim that the
row and column variables are independent at the 0.1 significance level

(A) 23.209 (B) 13.277 (C) 15.987 (D) 7.779

Monday Tuesday Wednesday Thursday Friday Total Nondefective 85 89 97 92 87 450 Defective 8 10 4 8 9 39 Total 93 99 101 100 96 489

Explanation / Answer

The degree of freedom for this table is

(r-1) (c-1)where r is rows and c is column

Chi square critical at 4 d.f is 7.77

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