Chi-Square test for Independence

Problem 5.
You are asked to conduct a study to determine if gender has any bearing on the choice of a dog or cat as a pet. You take a random sample of 350 adults and ask each what kind of pet they would prefer, a dog or a cat? The results of your poll are summarized in the following contingency table:

Male Female
Dog 70 99
Cat 80 101

Test the independence of gender and preferred pet at a 5% level. Explain your conclusion (don't just say "can't reject Ho" or "gender is not independent of pet choice").

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...t against the alternative hypothesis H1: They are dependent

Male Female

B(Preferred Pet)
70(a) 99(b)

80 (c) 101 (d)

Here total ...