This quiz works best with JavaScript enabled. Home > Ugc Net > Paper 1 > Research Stats > Concept Of Point And Interval Estimation – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Concept Of Point And Interval Estimation Quiz 1 (16 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A property of a point estimator that occurs whenever a large sample sizes tend to provide point estimates closer to the population parameter A) Efficiency. B) Unbiased. C) Relative estimation. D) Consistency. Show Answer Correct Answer: B) Unbiased. 2. Values that belong to a population A) Sample. B) Parameter. C) Error. D) Statistic. Show Answer Correct Answer: B) Parameter. 3. It is denoted by $ \mu$ . A) Population. B) Population Mean. C) Sample Mean. D) Population Standard Deviation. Show Answer Correct Answer: B) Population Mean. 4. When the confidence level is 90%, alpha level is 0.01. A) False, it's 0.10. B) True. C) False, it's 0.05. D) False, it's 0.50. Show Answer Correct Answer: A) False, it's 0.10. 5. A point estimate of a population consists of how many numbers? A) 1. B) 10. C) Infinite. D) 2. Show Answer Correct Answer: A) 1. 6. It is the difference between a value and the mean. A) Population mean. B) Sample Mean. C) Error. D) Parameter. Show Answer Correct Answer: C) Error. 7. The lifetime of a certain type of battery is known to be normally distributed with a standard deviation of 20 hours. A sample of 50 batteries had a mean lifetime of 120.1 hours. It is desired to construct a 99% confidence interval for the mean lifetime of this type of battery.What is the Confidence Interval to one decimal place? A) (112.82, 127.38). B) (114.56, 125.64). C) (112.8, 127.4). D) (114.5, 125.6). Show Answer Correct Answer: C) (112.8, 127.4). 8. It is a mathematical model for decision making A) Sample. B) Population. C) Normal Curve. D) Error. Show Answer Correct Answer: C) Normal Curve. 9. What is the critical value z-value for a 99% confidence interval? A) 2.58. B) -1.64. C) -2.58. D) 1.96. Show Answer Correct Answer: A) 2.58. 10. It is a subset of a set of data. A) Parameter. B) Population. C) Sample. D) Error. Show Answer Correct Answer: C) Sample. 11. Find the value of $ z_{\frac{\alpha}{2}}$ for a 90% confidence interval. A) 1.440. B) -1.598. C) 1.645. D) -1.96. Show Answer Correct Answer: C) 1.645. 12. It is denoted by $ \sigma$ . A) Population. B) Population Standard Deviation. C) Sample Standard Deviation. D) Sample. Show Answer Correct Answer: B) Population Standard Deviation. 13. For 95% confidence level, the coefficients are $ \pm1.65$ A) True. B) False, it's $ \pm1.96$. C) False, it's $ \pm2.58$. D) None of above. Show Answer Correct Answer: B) False, it's $ \pm1.96$. 14. It is a set of data one wishes to investigate. A) Error. B) Population. C) Sample. D) Normal Curve. Show Answer Correct Answer: B) Population. 15. When $ \alpha=0.01$, the confidence coefficients are $ \pm1.96$ A) True. B) False, it's $ \pm1.65$. C) False, it's $ \pm2.58$. D) None of above. Show Answer Correct Answer: C) False, it's $ \pm2.58$. 16. Given the interval (1.2, 1.8), what is the point estimate and the margin of error? A) 1.2, 0.3. B) 1.2, 0.6. C) 1.5, 0.6. D) 1.5, 0.3. Show Answer Correct Answer: D) 1.5, 0.3. Related QuizzesPaper 1 QuizzesUgc Net QuizzesAnalysis Of Variance QuizChi Square QuizCoefficient Of Variation Discrete Serious And Continuous Serious QuizConcept Of Sampling And Other Concepts Related To Sampling QuizConfidence Intervals QuizCorrelation Coefficient Coefficient Of Determination QuizDecision Making With Hypothesis Testing QuizDegree Of Freedom Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books