LAVC Americans that Have Seen a UFO Skeptical Paranormal Researcher Discussion

1. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is at most two in every ten thousand. Assuming that a hypothesis test to support this claim has been conducted and that the conclusion is reject the null hypothesis, state the conclusion in nontechnical terms.

a. There is not sufficient evidence to support the claim that the proportion of Americans that have seen a UFO, p, is at most two in every ten thousand.

b. There is not sufficient evidence to reject the claim that the proportion of Americans that have seen a UFO, p, is at most two in every ten thousand.

c. There is sufficient evidence to reject the claim that the proportion of Americans that have seen a UFO, p, is at most two in every ten thousand.

d. There is sufficient evidence to support the claim that the proportion of Americans that have seen a UFO, p, is at most two in every ten thousand.

2. A manufacturer considers his production process to be out of control when defects exceed 3.9%. In a random sample of 118 items, the defect rate is 9.6% but the manager claims that this is only a sample fluctuation and production is not really out of control. At the 10% level of significance, use the p-value method to test the manager’s claim.

Enter the test statistic. (Round your answer to nearest hundredth.)

3. A manufacturer considers his production process to be out of control when defects exceed 4.3%. In a random sample of 148 items, the defect rate is 9.0% but the manager claims that this is only a sample fluctuation and production is not really out of control. At the 5% level of significance, use the critical value method to test the manager’s claim.

Enter the test statistic. (Round your answer to nearest hundredth.)

4.A medical school claims that more than 24% of its students plan to go into general practice. It is found that among a random sample of 50 of the school’s students, 28% of them plan to go into general practice. Find the P-value for a test to support the school’s claim. (Round your answer to nearest ten-thousandth.)