Multiple Choice Can You please help me to find the right answer in every question? and please help me to know the solution/explanation in every number/in number that need explanation.thanks in advance.I will mark it helpful
the correct answer. 1. Which of these values is a parameter? a. X b. x CU 2. It is a specific numerical value of a population parameter. d.z a. sample mean b. point estimate c. Interval estimate 3. It is a range of values that may contain the parameter of a population. d. confidence level a. sample mean b. point estimate C. interval estimate d. confidence level 4. Among the three values of central tendency, the best estimator of the population parameter U is the a. sample mean b. point estimate 5. A range of values called c. Interval estimate d. confidence level is also used to estimate a population parameter. a. sample mean b. point estimate c. Interval estimate 6. Find the confidence coefficients for 90% confidence d. confidence level a. 1.65 b. 1.56 C. 1.96 d. 2 58 7. Find the confidence coefficients for 95% confidence a. 1.65 b. 1.66 c. 1.96 d. 2.58 8. Find the confidence coefficients for 99% confidence a. 1.65 b, 1.66 C 1.96 d. 2.58 9. It is the number of values that are free to vary after a sample statistic has been computed. a. t-values b. t-values C. proportion d. degrees of freedom 10. It Is the proportions of the areas in two tails of the t-curve. a. I-values b. t-values c. proportion d. degrees of freedom 11. Using the t-table, give the confidence coefficients for n-25, 99% confidence a. 2.797 b. 2.787 C. 2.92 d. 2.776 12. Using the t-table, give the confidence coefficients for n=3, 90% confidence a. 2.797 b. 2.787 C. 2.92 d. 2.776 13. Using the t-table, give the margin of error for n-9, s-2.8, 90% confidence a. 1.74 b. 1.65 C. 2.28 d. 1.96 For #s 14 - 19. An admission officer of an educational Institution wants to know the mean age of all entering mathematics majors. He computed a mean age of 18 years and a standard deviation of 1.2 years on a random sample of 25 entering mathematics majors assumed to be coming from a normally distributed population. With 99% confidence: 14. Find the point estimate of the population mean. a. 1.2 b. 18 C. 25 d. 24 15. What is the test statistic to be used to calculate the interval? a.p b. t d, none of these 16. What is the confidence coefficient? a. 2.92 b. 2.797 c. 2.787 d. 2.58 17. Find the maximum error E. a. 0.24 b. 0.67 CO.75 d. 12 18 - 19. Find the lower and the upper confidence limits. &. 16.8, 19.2 b. 17 25, 18.75 C 17 33, 18,67 d. 17.76. 18 24 For numbers 20-24: Consider all sample of site 5 from this population: 25 68 10 12 13 20. Compute the mean of the population a. 9.6954 b. B c. 44.857 d 94 21. Compute the variance of the population c 6.27 d. 54 4. 9.6954 b. B 22. Find the number of samples of site 5, a. 21 b. 35 C. 42 23. What is the mean of the sampling distribution of the sample mean? d. 70 a. 9.6954 b. B C. 6.27 24. What is the variance of the sampling distribution of the sample mean? d. 94 a. 9.6954 b.8 C. 6.27 d. 94 For numbers 25 -27. A population has a mean of 60 and a standard deviation of 5. A random sample of 16 measurements is drawn from this population. Assume that the population is infinite 25. What is the mean of the sampling distribution? a. 1.5625 b. 60 c. 5 26. What is the standard deviation of the sampling distribution? d. 1.25 a. 1.5625 b. 60 C.5 27. What is the variance of the sampling distribution? d. 1.25 a. 1.5625 b. 60 C.5 d. 1.25 For numbers 28 - 33: Consider a population consisting of 1, 2, 3, 4, and 5. Suppose samples of size 4 are drawn from this population, 28. What is the mean of the population? 3. 3 b. 3.75 c. 5 d. 7.5 29. What is the variance of the population? a. 1 b. 2 c. 3 d. 4 30. What is the standard deviation of the population? a. 1 b. 1.414 C. 1.732 d. 2 31. What is the mean of the sampling distribution of the sample mean? a.2 b. 3 C. 4 d. s 32. What is the variance of the sampling distribution of the sample means? a. 0.125 b. 0.5 c. 0.05 d. 1.25 33. What is the standard deviationD of the sampling distribution of the sample means? a. 0.3536 b. 0.7071 c. 0.2236 d. 1.118 34. If we want to get a good_ of the population mean, we have to make the sample size sufficiently large. a. value b. estimate C. parameter d. statistic 35. If a population has a mean of 25.75, what is the mean of the sampling distribution? a. Less than 25.75 b. Larger than 25.75 a. closer to 25.75 d. Exactly the same on 25.75
