Question

Select one answer A criminal investigator conducts a study on the accuracy of fingerprint matching and recruits a random sample of 35 people to participate. Since this 10 points is a random sample of people, we don't expect the fingerprints to match the comparison print. In the general population, a score of 80 indicates no match. Scores greater than 80 indicate a match. If the mean score suggests a match, then the fingerprint matching criteria are not accurate. The null hypothesis is that the mean match score is 80. The alternative hypothesis is that the mean match score is greater than 8o. The criminal investigator chooses a 5% level of significance. She performs the experiment and analyzes the results. She uses a t-test for a mean and obtains a p-value of o.04. Which of the following is a reasonable interpretation of her results? A. O This proves that there is evidence that the mean match score is greater than 8o. This suggests that the fingerprint matching criteria are not accurate. B. O If there is a treatment effect, the sample size was too small to detect it. This suggests that we need a larger sample to determine if the fingerprint matching criteria are not accurate. C. O She cannot reject the null hypothesis. This suggests that the fingerprint matching criteria could be accurate. D. O This proves that there is evidence that the mean match score is equal to 8o. This suggests that the fingerprint matching criteria is accurate.

Answer 1

Since the p - value is less than 0.05, we reject Ho and conclude the significance. Hence,

Option A is correct.