A Company Is Willing to Renew Its Publishing Contract with a Popular

A company is willing to renew its publishing contract with a popular calculus book author only if he can prove that his book can sell to more than 15% of the entire calculus market.The publishing company contacts 3000 calculus professors at random and only 420 professors were interested in the book.Should the company renew the contract? State the critical value required to perform an appropriate hypothesis test using α = 0.05.

A) -1.645
B) -2.326
C) 1.645
D) 1.96
E) -1.96

Correct Answer:

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