This quiz works best with JavaScript enabled. Home > Finance > Economics > Agricultural Economics > Agricultural Statistics And Economics > Agricultural Statistics And Economics – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Agricultural Statistics And Economics Quiz 7 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Intelligent tests, aptitudes, personality traits, and attitudes, creation of scales and measuring instruments A) Research & Statistics. B) Social Science. C) Psychology. D) Biology. E) Health. Show Answer Correct Answer: C) Psychology. 2. At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.6. What percentage of students at the high school have a GPA between 2.3 and 3.5? A) 95%. B) 68%. C) 99.7%. D) 84%. Show Answer Correct Answer: B) 68%. 3. The correlation between the heights of fathers and the heights of their (fully grown) sons is r = 0.52. This value was based on both variables being measured in inches. If fathers' heights were measured in feet (one foot equals 12 inches), and sons' heights were measured in furlongs (one furlong equals 7920 inches), the correlation between heights of fathers and heights of sons would be A) Much smaller than 0.52. B) Slightly smaller than 0.52. C) Unchanged:equal to 0.52. D) Slightly larger than 0.52. E) Much larger than 0.52. Show Answer Correct Answer: C) Unchanged:equal to 0.52. 4. Which z-star value is used to construct a 95% confidence interval? A) 2.33. B) 2.58. C) 1.96. D) 1.65. Show Answer Correct Answer: C) 1.96. 5. Which of the following best describes a Type I error? A) The null is true, but we mistakenly reject it. B) The null is false and we reject it. C) The null is false, but we fail to reject it. D) The null is true but we fail to reject it. E) The null is true, and we fail to reject it. Show Answer Correct Answer: A) The null is true, but we mistakenly reject it. 6. Identify whether the information described is a parameter or statistic. 2. The average height of 30 mango tree samples is 100 feet with a canopy of approximate 35 feet. A) Cannot be determined. B) Parameter. C) Statistic. D) Needs more information. Show Answer Correct Answer: C) Statistic. 7. A car rental agency has two locations, one by the airport and the other downtown. The agency rents 70% of its cars at the airport and the rest downtown. At the airport, 20% of the rentals are Sport Utility Vehicles (SUVs). At the downtown location, 40% are SUVs. If a customer is selected at random, what is the probability that she did NOT rent an SUV? A) 0.26. B) 0.40. C) 0.66. D) 0.74. E) 0.70. Show Answer Correct Answer: D) 0.74. 8. Only one of the following statements is plausible. Which one? A) There is a high correlation between the gender of American workers and their income. B) We found a high correlation (r = 1.09) between students' ratings of faculty teaching and ratings made by other faculty members. C) The correlation between planting rate and yield of corn was found to be r = 0.23 bushels. D) We found the correlation between Verbal SAT and Math SAT scores to be r = 0.88. Show Answer Correct Answer: D) We found the correlation between Verbal SAT and Math SAT scores to be r = 0.88. 9. Which confidence level corresponds to a critical value of 1.64? A) 90%. B) 95%. C) 99%. D) None of above. Show Answer Correct Answer: A) 90%. 10. A support hotline asks callers to stay on the line after they have completed their call to respond to a short survey.What type of sample is this? A) Simple random sampling. B) Systematic random sampling. C) Stratified random sampling. D) None of the above. Show Answer Correct Answer: D) None of the above. 11. The correlation coefficient is represented by what? A) $c$. B) $r$. C) $r^2$. D) $s$. Show Answer Correct Answer: B) $r$. 12. Which of the following are resistant to outliers? A) The mean and standard deviation. B) The median and standard deviation. C) The median and the range. D) The median and IQR. E) The range and IQR. Show Answer Correct Answer: D) The median and IQR. 13. A 90% confidence interval for a population mean is determined to be 800 to 900. If the confidence level is increased to 95% confidence and the sample statistics and sample size remain the same, the confidence interval A) Becomes wider. B) Becomes narrower. C) Does not change. D) None of above. Show Answer Correct Answer: A) Becomes wider. 14. An enquiry in which each unit of the universe is studied is called ..... A) Population. B) Incomplete enumeration. C) Sample. D) Complete enumeration. Show Answer Correct Answer: D) Complete enumeration. 15. 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).Loretta is 20 months old and is 80 centimeters tall. What is her residual? A) 2.47. B) 77.53. C) -12.60. D) -2.47. E) 12.60. Show Answer Correct Answer: A) 2.47. 16. Which of the following is the definition of a "point estimate? " A) The average of a sample. B) The average of a population. C) The midpoint of a confidence interval. D) The confidence interval. Show Answer Correct Answer: C) The midpoint of a confidence interval. 17. Which one of the following statements is true about Student's t distribution? A) The density curve of the t distribution is symmetric and centered at the true mean of the population. B) The density curve of the t distribution has heavier "tails" than the density curve of the standard Normal distribution. C) The density curve of the t distribution more closely resembles the density curve of the standard Normal distribution when the number of degrees of freedom is small. D) None of above. Show Answer Correct Answer: B) The density curve of the t distribution has heavier "tails" than the density curve of the standard Normal distribution. 18. What is the format for interpreting a confidence interval? A) The interval from to captures the true mean in context. B) C% of samples of the same size taken from the same population will capture the parameter in question. C) There is convincing evidence that C% gives the interval ( , ) capturing the parameter in question. D) We are C% confident that the interval from to captures the [parameter in context]. Show Answer Correct Answer: D) We are C% confident that the interval from to captures the [parameter in context]. 19. A 90% confidence interval for a population mean is determined to be 800 to 900. If the confidence is increased to 95% confidence while the sample statistics and sample size remain the same, the confidence interval A) Becomes wider. B) Becomes narrower. C) Does not change. D) None of above. Show Answer Correct Answer: A) Becomes wider. 20. Construct a 95% confidence interval for the population mean mu. Assume the population has a normal distribution. A sample of 20 college students had mean annual earnings of $ 3120 with a standard deviation of $ 677. A) ($ 2657, $ 2891). B) ($ 1324, $ 1567). C) ($ 2135, $ 2567). D) ($ 2803, $ 3437). Show Answer Correct Answer: D) ($ 2803, $ 3437). 21. Ms. Washington is investigating teachers' attitudes toward year-round schooling. She is particularly interested in describing the attitudes of teachersfrom small, medium, and large schools. Which sampling procedure should be used by Ms. Washington to ensure her sample is representative of these types of schools? A) Simple random sampling. B) Stratified random sampling. C) Systematic sampling. D) Convenience sampling. Show Answer Correct Answer: B) Stratified random sampling. 22. Which District has the highest total of rice crop entrepreneurs in 2021? A) Tutong District. B) Belait District. C) Brunei & Muara District. D) Temburong District. Show Answer Correct Answer: C) Brunei & Muara District. 23. It represents differences in quality, character, or kind but not in amount. A) Independent variable. B) Quantitative variable. C) Discrete variables. D) Continuous variable. E) Qualitative variables. Show Answer Correct Answer: E) Qualitative variables. 24. Whatever probability we choose as the cutoff for what is small is what we call the ..... A) Significance level. B) Insightfulness level. C) Meaningfulness level. D) Importance level. Show Answer Correct Answer: A) Significance level. 25. This part of survey is the list of question items which can be open-ended questions A) Introduction. B) Respondents. C) Heading. D) Questions to answer. Show Answer Correct Answer: D) Questions to answer. 26. The amount added and subtracted to the statistic. A) Margin of Error. B) Population. C) Point Estimator. D) Statistic. Show Answer Correct Answer: A) Margin of Error. 27. A ..... gives an interval of plausible values for the ..... A) Confidence interval, parameter. B) Confidence interval, statistic. C) Point estimate, parameter. D) Point estimate, statistic. Show Answer Correct Answer: A) Confidence interval, parameter. 28. A sample of 40 people owned an average of 1.35 apple products. It is known from a previous study that the population standard deviation of apple product ownership is 0.63 products. Construct a 95% confidence interval. A) (1.09, 1.61). B) (1.11, 1.58). C) (1.15, 1.55). D) (1.19, 1.51). Show Answer Correct Answer: C) (1.15, 1.55). 29. A researcher finds that the correlation between the personality traits "greed" and "superciliousness" is-0.40. What percentage of the variation in greed can be explained by the relationship with superciliousness? A) 40%. B) 16%. C) Not enough information is given. D) 80%. Show Answer Correct Answer: B) 16%. 30. What is the t value associated with 90% confidence and a sample size of 15? A) 1.753. B) 1.345. C) 1.761. D) 1.341. Show Answer Correct Answer: C) 1.761. ← 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 6Agricultural Statistics And Economics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books