This quiz works best with JavaScript enabled. Home > Finance > Economics > Agricultural Economics > Agricultural Statistics And Economics > Agricultural Statistics And Economics – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Agricultural Statistics And Economics Quiz 6 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A method where the researcher sees the situation directly A) Questionnaire. B) Reading statistical publication. C) Interview. D) Observation. Show Answer Correct Answer: D) Observation. 2. A study was done on the relationship between high school grade point average (GPA) and scores on the SAT. The following 8 scores were from a random sample of students taking the exam:x(GPA) 3.2 3.7 3.9 3.1 3.6 2.5 2.9 3.5 y(SAT) 725 743 745 665 700 562 590 740What is the percent of variation in SAT scores is accounted for by the LSRL? A) -0.35. B) 0.98. C) 0.12. D) 0.35. Show Answer Correct Answer: C) 0.12. 3. Identify whether the information described is a parameter or statistic. Sixty-two of the 97 passengers aboard the Hindenburg airship survived its explosion. A) Parameter. B) Statistic. C) Cannot be determined. D) Needs more information. Show Answer Correct Answer: A) Parameter. 4. In a study of 150 accidents that required treatment in an emergency room, 36% involved children under 6 years of age. Find the 90% confidence interval of the true proportion of accidents that involve children under the age of 6. A) 0.275-0.433. B) 0.331-0.413. C) 0.295-0.425. D) 0.255-0.455. Show Answer Correct Answer: C) 0.295-0.425. 5. Divide the class into four groups (freshman, sophomore, junior and senior) and take a random sample of two students from each group A) Simple random sampling. B) Stratified random sampling. C) Cluster sampling. D) Systematic sampling. Show Answer Correct Answer: B) Stratified random sampling. 6. A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the sample mean? The standard deviation of the birth weights is known to be 6 ounces. A) 3. B) 4. C) 15. D) 16. Show Answer Correct Answer: D) 16. 7. A survey of 800 women shoppers found that 136 of them shop on impulse. What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse? A) (0.139, 0.201). B) (0.144, 0.196). C) (0.148, 0.192). D) (0.136, 0.204). Show Answer Correct Answer: A) (0.139, 0.201). 8. Concerns how spread out the values are. A) Distribution. B) Average. C) Numerical Data. D) Variability. E) Central Tendency. Show Answer Correct Answer: D) Variability. 9. How many Agricultural Development Areas for growing rice in Brunei & Muara District? A) 7. B) 6. C) 3. D) 5. Show Answer Correct Answer: D) 5. 10. Construct a 95% confidence interval for the population mean, mu. Assume the population has a normal distribution. A sample of 25 randomly selected students has a mean test score of 81.5 with a standard deviation of 10.2 A) (66.35, 69.89). B) (87.12, 98.32). C) (56.12, 78.34). D) (77.29, 85.71). Show Answer Correct Answer: D) (77.29, 85.71). 11. What is the margin of error for the interval (6.8, 12.9)? A) 3.50. B) 9.85. C) 6.8. D) 3.05. Show Answer Correct Answer: D) 3.05. 12. NSSO stands for ..... A) National Statistical sphere Organisation. B) Net Sample Survey Organisation. C) National Sample Survey Organisation. D) National Surgical Survey Organisation. Show Answer Correct Answer: C) National Sample Survey Organisation. 13. The population of the United States is aging. At right is a stemplot of the percentage of residents aged 65 and older in each of the 50 states, according to the 2010 census. There are three outliers:Alaska has the lowest, Utah second lowest, and Florida has the highest. What is the percentage for Utah? A) 8.9%. B) 12.5%. C) 6.3%. D) 9.4%. Show Answer Correct Answer: D) 9.4%. 14. What can you do to reduce the margin of error? I. Decrease confidence levelII. Increase sample sizeIII. Decrease critical valueIV. Increase standard error A) II & III. B) I & III. C) I, II, III. D) I, II, III, IV. E) I & II. Show Answer Correct Answer: C) I, II, III. 15. You take a poll and find that 34% of the 100 people you asked dislike school lunches. Using a 95% confidence level, what is the margin of error? A) .034. B) 0.093. C) .34. D) 0.047. Show Answer Correct Answer: B) 0.093. 16. In Belait District, one of the Agricultural Development Areas for growing rice is KKP Lot Sengkuang A. Which of the following is the other Agricultural Development Area at Belait District for growing rice? A) KKP Selapon B. B) KKP Lekiun. C) KKP Limpaki. D) KKP Kandol. Show Answer Correct Answer: D) KKP Kandol. 17. What is the Paddy Scheme Price in Brunei Darussalam? A) $ 1.60/kg. B) $ 1.80/kg. C) $ 1.60. D) $ 1.80. Show Answer Correct Answer: A) $ 1.60/kg. 18. Which of the following would not decrease the width of a confidence interval? I. Increasing the sample sizeII. Decreasing the degrees of freedomIII. Decreasing the confidence level A) I only. B) II only. C) III only. D) I and II only. E) II and III only. Show Answer Correct Answer: B) II only. 19. An irate patient complained that the cost of a doctor's visit was too high. She randomly surveyed 20 other patients and found that the mean amount of money they spent on each doctor's visit was $ 44.80. The standard deviation of the sample was $ 3.53. Find the 95% confidence interval of the population mean. A) $ 44.53-$ 48.21. B) $ 43.15-$ 48.25. C) $ 43.15-$ 46.45. D) $ 42.65-$ 48.25. Show Answer Correct Answer: C) $ 43.15-$ 46.45. 20. What type of sampling? A student asks 12 friends to participate in a psychology experiment. A) Simple Random sample. B) Convenience sample. C) Stratified Random sample. D) Systematic Random Sample. Show Answer Correct Answer: B) Convenience sample. 21. Imagine that a local clothing manufacturer has 2, 700 employees. The personnel manager decides to ask the employees for suggestions on how to improve their workplace. It would take too long to survey everyone, so the manager chooses to systematically sample 300 of the employees. What would be the sample interval, k? A) 10. B) 300. C) 9. D) 0.111. Show Answer Correct Answer: C) 9. 22. Which statements below about least-squares regression are correct? I. Switching the explanatory and response variables will not change the least-squares regression line.II. The slope of the line is very sensitive to outliers in the x direction with large residuals.III. A value of r2 close to 1 does not guarantee that the relationship between the variables is linear. A) Only I is correct. B) Only II is correct. C) Only III is correct. D) Both II and III are correct. E) All three statements-I, II, and III-are correct. Show Answer Correct Answer: D) Both II and III are correct. 23. It is known that 15% of the seniors in a large high school enter military service upon graduation. If a group of 20 seniors are randomly selected, what is the probability of observing at most one senior who will be entering military service? A) 20(0.15)1(0.85)19. B) 1-(0.85)20. C) (0.85)20+ 20(0.15)1 (0.85)19. D) 1-20(0.15)1(0.85)19. E) (0.85)20. Show Answer Correct Answer: C) (0.85)20+ 20(0.15)1 (0.85)19. 24. A 12 oz can of soda has a mean volume of 12 oz, with a standard deviation of .25 oz. How common are cans with less than 11.5 oz of soda? Calculate the probability. A) .15%. B) 2.5%. C) 2.25%. D) 2.35%. Show Answer Correct Answer: B) 2.5%. 25. A sample of 99 distances has a mean of 22 feet and a median of 22.5 feet. Unfortunately, it has just been discovered that the minimum value in the distribution, which was erroneously recorded as 15 actually has a value of 10. If we make this correction to the data, then A) The median stays the same, but the mean increases. B) The median remains the same, but the mean is decreased. C) The median increases, but the mean decreases. D) The median decreases, but the mean remains the same. Show Answer Correct Answer: B) The median remains the same, but the mean is decreased. 26. Determine the minimum sample size needed to construct a 95% confidence interval for the mean age of employees at a company. The estimate must be accurate to within 0.5 year. Assume the standard deviation is 4.8 years. A) 18. B) 355. C) 354. D) 19. Show Answer Correct Answer: B) 355. 27. A mayor is concerned about the percentage of city residents who express disapproval of his job performance. His political committee pays for a newspaper ad, hoping to keep his disapproval rating below 21%. They will use a follow up poll to access effectiveness. What are the correct null and alternative hypotheses? A) Ho:$\mu$=21Ha:$\mu$<21. B) Ho:p=.20Ha:p<.20. C) Ho:p= .21Ha:p< .21. D) Ho:p< .21Ha:p= .21. Show Answer Correct Answer: C) Ho:p= .21Ha:p< .21. 28. The 99% confidence interval for a proportion is (0.54, 0.72). What is the margin of error? A) 0.09. B) 0.66. C) 0.18. D) 0.63. Show Answer Correct Answer: A) 0.09. 29. A random sample of 40 students has a test score with mean = 81.5. Assume the population standard deviation is 10.2. Construct the confidence interval for the population mean, mu, if c = 0.90. A) (66.3, 89.1). B) (51, 8, 92.3). C) (78.8, 84.2). D) (71.8, 93.5). Show Answer Correct Answer: C) (78.8, 84.2). 30. A research group wishes to estimate the mean amount of time (in hours) that members of a fitness center spend exercising each week. They want to estimate the mean within a margin of error of 0.5 hours with a 95% level of confidence. Previous data suggests that the standard deviation is 2.2. Which of the following is the smallest sample size they could use? A) 90. B) 60. C) 75. D) 180. Show Answer Correct Answer: C) 75. ← PreviousNext →Related QuizzesAgricultural Economics QuizzesEconomics QuizzesAgricultural Statistics And Economics Quiz 1Agricultural Statistics And Economics Quiz 2Agricultural Statistics And Economics Quiz 3Agricultural Statistics And Economics Quiz 4Agricultural Statistics And Economics Quiz 5Agricultural Statistics And Economics Quiz 7Agricultural Statistics And Economics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books