A psychologist wishes to determine whether Tourette's syndrome occurs more in males than in females. She noted
Question:
1024 men without Tourette's
27 men with Tourette's
986 women without Tourette's
9 women with Tourette's
This problem requires the computation of a chi-square test with a two-by-two design. The null and alternative hypotheses are as follows:
H0: pT-m = pT-f
Ha: pT-m ≠ pT-f
Where
pT-m = the probability of having Tourette's syndrome for males, and
pT-f = the probability of having Tourette's syndrome for females.
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