1. It represents the standard deviation of the population 2 The sum of the probabilities if all values of the random variable must be equal to C BS C1 0.0 3. It represents the standard deviation of the sample B. 081 A 082 D. Which of the following symbols denotes the size/number of the population? А с B. n DP cin 5. This is the difference between the sample mean and the population mean BN А. с C Sampling error A Probability distribution D Sampling distribution of the sample mean B Random Variable This is the descriptive measures computed from a population B. Probability distribution A Parameters D. Statistics C. Sampling error This is the descriptive measures computed from a sample B Parameters B. Probability distribution C Sampling error D Statistics 8. What is the mean of the given samples 2, 5, 9, 10? A 6.65 B. 6.5 C. 56 D.556 Which of the following statements is correct? A The mean of the sampling distribution of the sample means is equal to 1 B. The mean of the sampling distribution of the sample means is equal to the population mean C. The mean of the sampling distribution of the sample means is greater than the population mean D. The mean of the sampling distribution of the sample means is always less than the population mean 10. It consists of a fixed number of elements, measurements or observation A Finite Population B. Infinite Population C. Sampling Error D. Standard error of the 11. Which of the following illustrates confidence level? A 95-99 B. 95% D. 165 12. Which of the following z-values determine the 95% confidence interval estimates? A 2.58 B. 1.96 C. 1.65 D. -1.96 and +1.96 13. Which of the following pair of confidence interval and zee sub alpha over two mismatch? A 90% - 1.56 B. 95% - 1.95 C. 99% - 2.58 D. Both A and B 7 C. 90 14. Which of the following confidence coefficient of 99% and degrees of freedom mismatch based on the I-T D. All of the above B. 3.169 - 11 C. 2.807 - 23 A 9.925-2 15. What happen to the value of t as n increases? D. Constant C. Decreases B. Equal to 1 A Increases 16. Does the Central Limit Theorem apply to small sample cases? C. Yes A No B. No, If the sample standard deviation is unknown D. Yes, If the sample standard deviation is kr 17. What is most commonly used statistics in describing population characteristics? B. Standard deviation A Variance D. Mean C. Raw score 18. What is needed in calculating an interval estimate? A Margin of Error B. Population Error C. Sampling Error D. Standard Error o 19. Which of the following sample-population representation mismatch? AX-7 B. S-0 C. s2 - 02 20. If the mean of 5 values is 10, then how many of the 5 values are free to vary? A 1 B. 3 C. 4 D. 5 21. Which of the following denotes the value of a parameter? AX B. H C. X D. t 22 Which of the following are the 95% confidence coefficients? A +258 B. +2.33 C. +1.96 D. +1.645 23. When n<30 and the population standard deviation is not known, what is the appropriate distribution? B. t C. A 0.330 C.0.44 D. none of these D.Uz - D.P Az 24. Given n = 50, 0 = 1.2, and a = 0.1. The maximum error E is approximately B0.39 25. What do we call the probability that a parameter is contained in a range of values? A Confidence Limit C. Confidence Interval B. Confidence Level D. Confidence Coefficient 26. Does the Central Limit Theorem apply to small sample cases? A NO B. Yes C. No if the sample standard deviation is unknown D. Yes, If the sample standard deviation
