10. What is the best point estimate of the GWA of all senior high school students?
A. 85 B. 87 C. 88 D. 89
11. At 99% confidence level, what is the confidence coefficient to be used?
A. 1.282 B. 1.645 C. 1.96 D. 2.575
12. At 99% confidence level, what is the estimated standard error of the mean? (2 points)
A. 0.2521 B. 0.2551 C. 0.2567 D. 0.2732
13. At 99% confidence level, what is the margin of error to estimate the GWA of all senior
high school students? (2 points)
A. 0.3291 B. 0.4223 C. 0.6610 D. 0.6613
14. At 99% confidence level, what is the interval estimate of the GWA of all senior high
school students?
A. 87.3556 - 88.6776 C. 87.5777 - 88.4223
B. 87.4969 - 88.5031 D. 87.6709 - 88.3291
15. At 95% confidence level, what is the confidence coefficient to be used?
A. 1.282 B. 1.645 C. 1.96 D. 2.576
16. At 95% confidence level, what is the estimated standard error? (2 points)
A. 0.2521 B. 0.2551 C. 0.2567 D. 0.2732
17. At 95% confidence level, what is the margin of error to estimate the GWA of all senior
high school students? (2 points)
A. 0.3291 B. 0.4223 C. 0.5031 D. 0.6613
18. At 95% confidence level, what is the interval estimate of the GWA of all senior high
school students?
A. 87.3387 - 88.6613 C. 87.5777 - 88.4223
B. 87.5135 - 88.5197 D. 87.6709 - 88.3291
For items 19-21, In preparation for the next school year, the school administrator wants to
estimate the GWA. If they want to estimate the GWA accurate within an error of 0.75 from
its true value,
19. What is the estimated population standard deviation?
A. 2.93 B. 3.33 C. 3.43 D. 3.45
20. What should be the sample size at 99% confidence level? (2 points)
A. 141 B. 200 D. 375 D. 425
21. What should be the sample size at 95% confidence level? (2 points)
A. 65 B. 82 D. 92 D. 104
10. What is the best point estimate of the GWA of all senior high school students?
A. 85 B. 87 C. 88 D. 89
11. At 99% confidence level, what is the confidence coefficient to be used?
A. 1.282 B. 1.645 C. 1.96 D. 2.575
12. At 99% confidence level, what is the estimated standard error of the mean? (2 points)
A. 0.2521 B. 0.2551 C. 0.2567 D. 0.2732
13. At 99% confidence level, what is the margin of error to estimate the GWA of all senior
high school students? (2 points)
A. 0.3291 B. 0.4223 C. 0.6610 D. 0.6613
14. At 99% confidence level, what is the interval estimate of the GWA of all senior high
school students?
A. 87.3556 - 88.6776 C. 87.5777 - 88.4223
B. 87.4969 - 88.5031 D. 87.6709 - 88.3291
15. At 95% confidence level, what is the confidence coefficient to be used?
A. 1.282 B. 1.645 C. 1.96 D. 2.576
16. At 95% confidence level, what is the estimated standard error? (2 points)
A. 0.2521 B. 0.2551 C. 0.2567 D. 0.2732
17. At 95% confidence level, what is the margin of error to estimate the GWA of all senior
high school students? (2 points)
A. 0.3291 B. 0.4223 C. 0.5031 D. 0.6613
18. At 95% confidence level, what is the interval estimate of the GWA of all senior high
school students?
A. 87.3387 - 88.6613 C. 87.5777 - 88.4223
B. 87.5135 - 88.5197 D. 87.6709 - 88.3291
For items 19-21, In preparation for the next school year, the school administrator wants to
estimate the GWA. If they want to estimate the GWA accurate within an error of 0.75 from
its true value,
19. What is the estimated population standard deviation?
A. 2.93 B. 3.33 C. 3.43 D. 3.45
20. What should be the sample size at 99% confidence level? (2 points)
A. 141 B. 200 D. 375 D. 425
21. What should be the sample size at 95% confidence level? (2 points)
A. 65 B. 82 D. 92 D. 104
