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b. X CH d. z 2. It is a specific numerical value of a population parameter. 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. confide a. sample mean b. point estimate c. interval estimate d, confide 4. Among the three values of central tendency, the best estimator of the population parameter / is a. sample mean b. point estimate 5. A range of values called C. interval estimate d. confider is also used to estimate a population parameter. a. sample mean b. point estimate c. interval estimate d. confiden 6. Find the confidence coefficients for 90%% confidence a. 1.65 b. 1.56 C. 1.96 d. 2.58 7. Find the confidence coefficients for 95% confidence @. 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 196 d. 2:58 9. It is the number of values that are free to vary after a sample statistic has been computed. a. z-values b. t-values c. proportion d. degrees of 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 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 ent mathematics majors. He computed a mean age of 18 years and a standard deviation of 1.2 years on a r sample of 25 entering mathematics majors assumed to be coming from a normally distributed populati confidence: 14. Find the point estimate of the population mean. . 1.2 b. 18 C. 25 d. 24 15. What is the test statistic to be used to calculate the interval? O. P b. t d. none of the 16. What is the confidence coefficient? a 2.92 b. 2.797 c. 2.747 d. 2.58 17. Find the maximum error E 2 0.24 b. 0,67 C 0.75 d. 12 18 -19. Find the lower and the upper confidence limits. 5. 16.8, 19.1 b. 17 25, 18.75 C 17 33. 18.67 H. 17.75. 10 14