This quiz works best with JavaScript enabled. Home > Finance > Economics > Agricultural Economics > Agricultural Statistics And Economics > Agricultural Statistics And Economics – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Agricultural Statistics And Economics Quiz 5 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. It is the number of time an observation or a particular value appears in a data set. A) Constant. B) Frequency. C) Interval. D) Variable. Show Answer Correct Answer: B) Frequency. 2. A random sample of 85 sixth-graders in a large city take a course designed to improve scores on a reading comprehension test. Based on this sample, a 90% confidence interval for the mean improvement in test scores for all sixth-graders in the city taking this course is found to be (12.6, 14.8). Which of the following are the sample mean and margin of error on which this interval is based? A) Sample Mean = 13.7; Margin of Error = 1.1. B) Sample mean = 13.7; Margin of Error = 2.2. C) Sample mean is unknown; Margin of Error = 2.2. D) None of above. Show Answer Correct Answer: A) Sample Mean = 13.7; Margin of Error = 1.1. 3. Researchers studying acid rain measured the acidity of precipitation (response variable) in an isolated wilderness area in Colorado and the duration of rain in weeks (explanatory variable). The researchers reported that there was a strong negative linear association between "acidity" of precipitation and duration of rain in "weeks" . Determine which of the following is a possible measure of the relationship. A) R = 0. B) R =-0.95. C) R = 0.92. D) R = 1.0. E) R =-0.24. Show Answer Correct Answer: B) R =-0.95. 4. You have data on rainwater collected at 16 locations in the Adirondack Mountains of New York State. One measurement is the acidity of the water, measured by pH on a scale of 0 to 14 (the pH of distilled water is 7.0). Which inference procedure would you use to estimate the average acidity of rainwater in the Adirondacks? A) One-sample t interval for $\mu$. B) One-proportion z-test. C) One-sample t test. D) One-sample z interval for $\mu$. Show Answer Correct Answer: A) One-sample t interval for $\mu$. 5. If the standard deviation of a data set is 4, what is the variance? A) 2. B) 16. C) 4. D) None of above. Show Answer Correct Answer: B) 16. 6. A slice of pizza from a certain restaurant has an average area of 40 square inches with a standard deviation of 5 square inches. Assuming the distribution of areas is approximately normal, what proportion of slices will be between 35 and 50 square inches A) 34%. B) 68%. C) 95%. D) 81.5%. Show Answer Correct Answer: D) 81.5%. 7. It has same criteria as interval scales but has an absolute zero and multiples are meaningful. A) Data. B) Nominal data. C) Ordinal data. D) Ratio Scales. E) Interval Scales. Show Answer Correct Answer: D) Ratio Scales. 8. What does it mean when a test is statistically significant? A) It has reached alpha level status. B) It is important in practical terms. C) The test statistic had a P-value higher than the alpha level. D) The test statistic had a P-value lower than the alpha level. Show Answer Correct Answer: D) The test statistic had a P-value lower than the alpha level. 9. The increase of birth defects, and death toll near nuclear power plants. A) Government. B) Biology. C) Health. D) Environmental Science. E) Insurance. Show Answer Correct Answer: D) Environmental Science. 10. A researcher plans to conduct a test of hypotheses at the $\alpha$ = 0.01 significance level. She designs her study to have a power of 0.90 at a particular alternative value of the parameter of interest. The probability that the researcher will commit a Type I error is A) 0.90. B) 0.99. C) 0.10. D) 0.01. Show Answer Correct Answer: D) 0.01. 11. The point estimate for the difference of two proportions is: A) Sqrt(p*(1-p)/n). B) P-hat1 minus p-hat 2. C) Xbar1-xbar2. D) Z*. Show Answer Correct Answer: B) P-hat1 minus p-hat 2. 12. At a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true? A) 78% is a population and 72% is a sample. B) 72% is a population and 78% is a sample. C) 78% is a parameter and 72% is a statistic. D) 72% is a parameter and 78% is a statistic. Show Answer Correct Answer: C) 78% is a parameter and 72% is a statistic. 13. The symbol for the significance level is ..... A) $ \alpha$. B) $ \pi$. C) $ \mu$. D) $ \theta$. Show Answer Correct Answer: A) $ \alpha$. 14. A random sample of 150 students has a grade point average with a mean of 2.86. Assume the population standard deviation is 0.78. Construct the confidence interval for the population mean if c = 0.99. A) (2.31, 3.88). B) (2.51, 3.53). C) (2.43, 3.79). D) 2.70, 3.02). Show Answer Correct Answer: D) 2.70, 3.02). 15. Find the critical value zc necessary to form a 98% confidence interval. A) 2.05. B) 2.33. C) 0.8365. D) 0.5040. Show Answer Correct Answer: B) 2.33. 16. The null hypothesis is represented by: A) Ho. B) HP. C) T*. D) Ha. E) $\mu$. Show Answer Correct Answer: A) Ho. 17. What is the rental rate for Agricultural Development Areas for growing rice? A) $ 14.50/Ha/Yr. B) $ 13.50/Ha/Yr. C) $ 12.50/Ha/Yr. D) $ 11.50/Ha/Yr. Show Answer Correct Answer: C) $ 12.50/Ha/Yr. 18. Statistical enquiry means A) Search for knowledge with the help of statistical methods. B) Search for knowledge. C) It is science for knowledge. D) Collection of anything. Show Answer Correct Answer: A) Search for knowledge with the help of statistical methods. 19. For children between the ages of 18 months and 29 months, there is an approximately linearrelationship between height and age. The relationship can be represented by y-hat= 64.93 + 0.63x, where y represents height (in centimeters) and x represents age (in months).Joseph is 22.5 months old. What is his predicted height? A) 87.40. B) 50.80. C) 64.96. D) 65.96. E) 79.11. Show Answer Correct Answer: E) 79.11. 20. A sample of 30 women finds the mean height to be 62.3 in and the standard deviation to be 1.5 in. Find the margin of error of women's heights for a 95% confidence interval. A) 0.56. B) 1.699. C) 0.537. D) 1.12. Show Answer Correct Answer: A) 0.56. 21. Which of the following is NOT part of the sampling design process? A) Refining the research question. B) Specifying the sampling unit. C) Selection of the sampling technique. D) Defining of the population of the study. E) Determining the relevant sample frame. Show Answer Correct Answer: A) Refining the research question. 22. The standard IQ test has a mean of 96 and a standard deviation of 14. We want to be 99% certain that we are within 4 IQ points of the true mean. Determine the required sample size. A) 178. B) 1. C) 82. D) 10. Show Answer Correct Answer: C) 82. 23. Wilt and Bill, two basketball players, are having a free throw shooting contest. Wilt is known to make 75% of his free throws, and Bill is known to hit 85% of his free throws. Each of them takes 50 shots. Assuming that the shots are independent, what is the probability that Bill hits a higher percentage of his shots that Wilt? A) 0.9938. B) 0.1038. C) 0.8962. D) 0.0062. Show Answer Correct Answer: C) 0.8962. 24. What can you do to reduce the margin of error? A) Increase sample size. B) Decrease the confidence level. C) Increase the confidence level. D) Decrease sample size. Show Answer Correct Answer: A) Increase sample size. 25. A researcher at a major hospital wishes to estimate the proportion of the adult population of the U.S. that has high blood pressure. How large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 5%? A) 164. B) 542. C) 271. D) 9. Show Answer Correct Answer: C) 271. 26. Which z-value is used for a 95% confidence interval? A) 1.65. B) 2.58. C) 2.33. D) 1.96. Show Answer Correct Answer: D) 1.96. 27. Mrs. Trahan samples her class by selecting every third person on her class list. Which type of sampling method is this? A) Simple random sampling. B) Systematic random sampling. C) Stratified random sampling. D) Cluster random sampling. Show Answer Correct Answer: B) Systematic random sampling. 28. Identify whether the information described is a parameter or statistic. 4. There are 547 students in the school. All these students took and passed the test with average score of 156/ 170. A) Needs more information. B) Cannot be determined. C) Statistic. D) Parameter. Show Answer Correct Answer: D) Parameter. 29. Matthew is gathering data for his study. Matthew tells his research assistants to be sure to interview twenty 6th graders, twenty 7th graders, and twenty-five 8th graders. Which of the following methods of sampling is Matthew most likely using? A) Judgement Sampling. B) Quota Sampling. C) Probability Sampling. D) Stratified Random Sampling. Show Answer Correct Answer: B) Quota Sampling. 30. How can you reduce both Type I and Type II errors? A) Redo the tests. B) Tamper with the data. C) It can't be reduced. D) Increase the sample size. Show Answer Correct Answer: D) Increase the sample size. ← 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 6Agricultural Statistics And Economics Quiz 7Agricultural Statistics And Economics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books