Answer the following
circle ABCD 1. Which of the following factors is not considered in the O O O determination of sample size? A. margin of error B. level of confidence C. confidence interval D. variance or standard Deviation AB CD 2. The value of confidence coefficient ( Za ) of 1.645 is used in sample size determination if a researcher wants to be % confident that the parameter is within the estimate. A 99 B. 95 C. 92 D. 90B O O O 3. How does the level of confidence affect the sample size? (Consider that other factors are constant) A. The higher the level of confidence, the smaller the sample size required. B. The lower the level of confidence, the larger the sample size required. C. The lower the level of confidence, the smaller the sample size required. A B C confidence. D. The sample size remains constant in every level of O O o D 4. Which of the following is the correct equation for sample size determination? A. n = x - Za/2(--) C. n = (Za/2) +(0 ) 12 E B. n = X+ E D. n= (Za/2)(@)] E A B C O O O O 5. How does the margin of error and sample size affect one another? (Assume that the other factors are constant) A. A smaller sample size reduces the margin of error. B. A higher margin of error requires a larger sample. C. A lower margin of error requires a larger sample size. D. A small sample size results in a lower margin of error. A C O O O o 6. How does standard deviation o affect the sample size? (Assume that the other factors are constant) A. The sample size is constant for all values of o. B. Lower o reduces the required sample size. C. Lower o increases the required sample size. D. Higher o decreases the required sample size. A B C D 7. A researcher wants his estimate with a minimum margin O O O O of error. Which of the following is suggested? A. Reduce the sample size. B. Use a sample size of 30. C. Increase the sample size. D. Use a sample size of less than 25. A B D 8. How large is the sample size required so that a researcher is 98% confident with the estimate of a sample, of standard deviation 5, that the error will not be more than 2? A. B. 34 C. 42 D. 84 9. If a 95% level of confidence is applied by the researcher in A B D the condition given in item # 8, what sample size shall be O O O O. obtained? D. A. 8 B. 17 C. 24 34For questions 10 to 15, refer to the situation that follows. The diameter of the coconuts harvested in a local farm in Quezon Province is normally distributed with a population standard deviation of 8 mm. At a 95% level of confidence, a researcher wants to have an estimate that will not be more than 3 mm from the TRUE population average diameter of the coconuts. A B D 10. What correct confidence coefficient should be applied to O determine the required sample size? A. 2.576 B. 2.33 C. 1.96 D. 1.645 ABCI 11. What is the given population standard deviation from the 0 0 0 0 situation? A. 8 B. 16 C. 24 D. 64 A B C D 12. What is the desired margin of error for the estimate of the population parameter? A. 2 B. 3 C. 4 D. 16 A B C D . 13. What minimum sample size shall be used by a researcher O to meet the expected results? (Round up to the nearest whole number). A. 16 B. 28 C. 62 D. 107 A B D 14. If the researcher wishes to reduce the error of the estimate, what should be done? I Consider a larger sample. II Reduce the level of confidence III Increase the level of confidence. A. I only C. I and II only B. II only D. I and III only 15. What sample size is needed for the situation to have a O O O margin of error not more than 1? (Round to the nearest whole number) A. 87 B. 102 C. 246 D. 425
