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A company manufacturing computer chips finds that​ 92% of all chips manufactured correct function. In an...

A company manufacturing computer chips finds that​ 92% of all chips manufactured correct function. In an effort to increase the percentage of functional chips, management decides to provide additional training to those employees hired within the last year. After training was​ implemented, a sample of 450 randomly selected chips revealed 423 correctly functioned. A hypothesis test is performed to determine if the additional training was effective IN INCREASING the functional rate. Which of the following statement is true about this hypothesis​ test?

A) It is a​ one-tailed test about a proportion.

B) It is a​ two-tailed test about a proportion.

C) It is a​ one-tailed test about a mean.

D) It is a​ two-tailed test about a mean.

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