This quiz works best with JavaScript enabled. Home > 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 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Does the interval (3, 14) support the claim that the mean of a data set is 2.9 A) Yes. B) No. C) Not enough information. D) None of above. Show Answer Correct Answer: B) No. 2. A community college announces that the correlation between college entrance exam grades andscholastic achievement was found to be-1.08. On the basis of this you would tell the college that A) The entrance exam is a good predictor of success. B) The exam is a poor predictor of success. C) Students who do best on this exam will be poor students. D) Students at this school are underachieving. E) The college should hire a new statistician. Show Answer Correct Answer: E) The college should hire a new statistician. 3. It is the number of time an observation or a particular value appears in a data set. A) Frequency. B) Interval. C) Variable. D) Constant. Show Answer Correct Answer: A) Frequency. 4. 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. 5. 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 = 1.0. C) R = 0.92. D) R =-0.24. E) R =-0.95. Show Answer Correct Answer: E) R =-0.95. 6. 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 z interval for $\mu$. B) One-sample t interval for $\mu$. C) One-proportion z-test. D) One-sample t test. Show Answer Correct Answer: B) One-sample t interval for $\mu$. 7. 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. 8. 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) 68%. B) 34%. C) 81.5%. D) 95%. Show Answer Correct Answer: C) 81.5%. 9. It has same criteria as interval scales but has an absolute zero and multiples are meaningful. A) Interval Scales. B) Ordinal data. C) Ratio Scales. D) Nominal data. E) Data. Show Answer Correct Answer: C) Ratio Scales. 10. What does it mean when a test is statistically significant? A) It has reached alpha level status. B) The test statistic had a P-value higher than the alpha level. C) The test statistic had a P-value lower than the alpha level. D) It is important in practical terms. Show Answer Correct Answer: C) The test statistic had a P-value lower than the alpha level. 11. The increase of birth defects, and death toll near nuclear power plants. A) Biology. B) Health. C) Insurance. D) Government. E) Environmental Science. Show Answer Correct Answer: E) Environmental Science. 12. 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) 0.01. B) 0.10. C) 0.90. D) 0.99. Show Answer Correct Answer: A) 0.01. 13. The point estimate for the difference of two proportions is: A) Z*. B) Xbar1-xbar2. C) Sqrt(p*(1-p)/n). D) P-hat1 minus p-hat 2. Show Answer Correct Answer: D) P-hat1 minus p-hat 2. 14. 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. 15. The symbol for the significance level is ..... A) $ \alpha$. B) $ \theta$. C) $ \pi$. D) $ \mu$. Show Answer Correct Answer: A) $ \alpha$. 16. 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) (2.51, 3.53). B) (2.43, 3.79). C) (2.31, 3.88). D) 2.70, 3.02). Show Answer Correct Answer: D) 2.70, 3.02). 17. Find the critical value zc necessary to form a 98% confidence interval. A) 2.33. B) 2.05. C) 0.5040. D) 0.8365. Show Answer Correct Answer: A) 2.33. 18. The null hypothesis is represented by: A) Ha. B) Ho. C) T*. D) HP. E) $\mu$. Show Answer Correct Answer: B) Ho. 19. What is the rental rate for Agricultural Development Areas for growing rice? A) $ 11.50/Ha/Yr. B) $ 12.50/Ha/Yr. C) $ 13.50/Ha/Yr. D) $ 14.50/Ha/Yr. Show Answer Correct Answer: B) $ 12.50/Ha/Yr. 20. Statistical enquiry means A) It is science for knowledge. B) Search for knowledge. C) Collection of anything. D) Search for knowledge with the help of statistical methods. Show Answer Correct Answer: D) Search for knowledge with the help of statistical methods. ← 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 8Agricultural Statistics And Economics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books