Question

A company with a fleet of 150 cars found that the emission systems of 7 out of 22 they tested failed to meet pollution control guidelines. Is this strong evidence that more than 20% of the fleet might be out of compliance?

You are writing the null and alternative hypotheses. Should you use a left-tailed, right-tailed or two-tailed HA?

A) Left-tailed
B) Right-tailed
C) Two-tailed
D) Does not make any difference
E) Unable to determine with the given information

Two-tailed?
It is right-tailed

Answer B
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