Stats homework please help

Question

(a) What effect does increasing the margin of error have on finding a minimum sample size for the mean?

(b) Determine the decision that needs to be made at the 5% level of significance given the following information:

𝐻0:𝑝=0.45 𝐻𝑎:𝑝<.45and𝑃=0.064

Answer 1

As sample size increases, the margin of error decreases (and vice-versa).

Since the P value exceeds the level of significance, Ho is not rejected, i.e., there is not sufficient evidence that P is < 0.45.