The Business College Computing Center Wants to Determine the Proportion $\alpha$

The business college computing center wants to determine the proportion of business students who have personal computers (PC's) at home. If the proportion exceeds 35% , then the lab will scale back a proposed enlargement of its facilities. Suppose 300 business students were randomly sampled and 85 have PC's at home. Find the rejection region for this test using $\alpha$ =0.10 .

A) Reject $\mathrm { H } _ { 0 } \text { if } \mathrm { z } > 1.28$
B) Reject $\mathrm { H } _ { 0 } \text { if } \mathrm { z } < - 1.28$
C) Reject $\mathrm { H } _ { 0 } \text { if } \mathrm { z } > 1.645 \text { or } \mathrm { z } < - 1.645$
D) Reject $\mathrm { H } _ { 0 } \text { if } \mathrm { z } = 1.28 \text {. }$