Hey can someone help me with the blank box? I answered the multiple choice part
ID: 3432098 • Letter: H
Question
Hey can someone help me with the blank box? I answered the multiple choice part but just need help with the blank box answers! Thanks!'
Hey can someone help me with the blank box? I answered the multiple choice part but just need help with the blank box answers! Thanks!' 7. Suppose that 10percent of the fields in a given agricultural are infested with the sweet potato whitefly. One hundred fields in this area are randomly selected, and 35 are found to be infested with whitefly. (a) Assuming that the experiment satisfies the conditions of the binomial experiment, do the data indicate that the proportion of infested fields is greater than expected? Use the p-value approach, and test using a 5percent significance level. (Round your answer to four decimal places.) Null and alternative hypotheses: H0: p 0.1 H0: p = 0.1 versus Ha p 0.1 H0:p=0.1 versus Ha:p not equalto 0.1 p-value = Conclusion: H0 is not rejected. There is insufficient evidence to indicate that the proportion of infested fields is larger than expected. H0 Is not rejected. There is sufficient evidence to indicate that the proportion of infested fields is larger than expected. Q H0 Is rejected. There is sufficient evidence to indicate that the proportion of infested fields is larger than expected. H0 s rejected. There is insufficient evidence to indicate that the proportion of infested fields s larger than expected. (b) If the proportion of infested fields is found to be significantly greater than 0.10, why is this of practical significance to the agronomist? What practical conclusions might she draw from the results? The agronomist may determine that because the proportion of infested fields was unusual, no action needs to be taken. The agronomist may determine that an unusually low proportion of infested fields might indicate a contagious disease. The agronomist may determine that because the proportion of infested fields was not unusual, no action needs to be taken. The agronomist may determine that because the proportion of infested fields was not unusual, the sampling method was not random. Q The agronomist may determine that an unusually high proportion of infested fields indicates a contagious disease.Explanation / Answer
(8)(3) The test statistic is
Z=(phat-p)/sqrt(p*(1-p)/n)
=(67/100-0.5)/sqrt(0.5*0.5/100)
=3.4
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(4) It is a right-tailed test.
So the p-value= P(Z>3.4) =0.0003 (from standard normal table)
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(7)(a) The test statisitc is
Z=(phat-p)/sqrt(p*(1-p)/n)
=(35/100-0.1)/sqrt(0.1*0.9/100)
=8.333
It is a right-tailed test.
So the p-value=P(Z>8.33) =0 (from standard normal table)