A food processor wants to know whether the probability is really 0.60 that a customer will prefer a new kind of packaging to the old kind. If, in a random sample, 7 of 18 customers prefer the new kind of packaging to the old kind, test the null hypothesis θ = 0.60 against the alter-native hypothesis θ ≠ 0.60 at the 0.05 level of significance.
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