QUESTION 21 A student believes that the average grade on the

QUESTION 21 A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is H0: m < 85 Ha: m mc056-1.jpg 85 H0: m mc056-2.jpg 85 Ha: m > 85 H0: m mc056-3.jpg 85 Ha: m < 85 H0: m > 85 Ha: m mc056-4.jpg 85 4 points Save Answer

QUESTION 22 A random sample of 16 statistics examinations from a large population was taken. The average score in the sample was 78.6 with a variance of 64. We are interested in determining whether the average grade of the population is significantly more than 75. Assume the distribution of the population of grades is normal.. The p-value is between ____ and _____. .005 to .01 .01 to .025 .025 to .05 .05 to 0.1 4 points Save Answer

QUESTION 23 A random sample of 100 people was taken. Eighty-five of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%. At 95% confidence, it can be concluded that the proportion of the population in favor of candidate A is significantly greater than 80% is not significantly greater than 80% is significantly greater than 85% is not significantly greater than 85% 4 points Save Answer

QUESTION 24 The school\'s newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper\'s claim. The correct set of hypotheses is H0: P < 0.30 Ha: P mc064-1.jpg 0.30 H0: P mc064-2.jpg 0.30 Ha: P > 0.30 H0: P mc064-3.jpg 0.30 Ha: P < 0.30 H0: P > 0.30 Ha: P mc064-4.jpg 0.30 2 points Save Answer

QUESTION 25 A random sample of 16 statistics examinations from a large population was taken. The average score in the sample was 78.6 with a variance of 64. We are interested in determining whether the average grade of the population is significantly more than 75. Assume the distribution of the population of grades is normal. At 95% confidence, it can be concluded that the average grade of the population is not significantly greater than 75 is significantly greater than 75 is not significantly greater than 78.6 is significantly greater than 78.6

Solution

21)

Ho : miu < 85

Ho : miu >= 85

22)

0.025 and 0.05

for the other question

I can gladly help you but you should post it in a new qeustion

with more order because I dont understand