A. Read and analyze each question carefully. Choose the letter that corresponds to your answer. 1. The null hypothesis is said to be rejected in a right tailed test if the computed value is ___________ the critical value. a. Equal to b. Greater than c. Less than d. No relevance to 2. The alternative hypothesis is supported in a left tailed test if the computed value is ___________ the critical value. a. Equal to b. Greater than c. Less than d. No relevance to 3. The sample standard deviation () may be used as an estimate of the population standard deviation () when the value of is unknown. a. Z-test b. T-test c. Chi-square d. Central Limit Theorem 4. The most desirable statistical tool to be used when the sample size is greater than or equal than 30 and the population standard deviation is known. a. Z-test b. T-test c. Chi-square d. Central Limit Theorem 5. The statistical tool used when the sample size is less than 30 and the sample standard deviation is not presented. a. Z-test b. T-test c. Chi-square d. Central Limit Theorem 6. Refers to the number of variation the sample can have without breaking any constraints. a. Parameter b. Statistic c. Degrees of Freedom d. Sample Mean 7. ______________ states that the samples will be normally distributed and the sample mean will be approximately equal to the population mean as the sample size gets bigger. a. Hypothesis b. Central Limit Theorem c. T-test d. Parameter 8. Pertains to the certain point where the null hypothesis is determined to be rejected. a. Rejection Region b. Critical Value c. Non-Rejection Region d. Significance Level 9. T-test is the most recommendable tool to be used when ____________. a. Sample size is greater than 30 and population variance is known b. Sample size is less than 30 and population standard deviation is unknown c. Sample size is less than 30 and sample standard deviation is unknown d. Sample size is greater than 30 and population standard deviation is known 10. It is the statistical method used in making decisions using experimental data a. Simple Analysis b. Observation c. Hypothesis Testing d. Analytical Testing

B. Determine the CRITICAL VALUE given its directional test and sample size 11. left-tailed test = 0.005 n=13 a. -1.645 b. 1.645 c. -3.055 d. -3.012 12. right-tailed test = 0.01 n=21 a. -2.33 b. 2.33 c. 2.528 d. 2.512 13. two-tailed test = 0.02 n=30 a. 1.28 b. 1.645 c. 2.462 d. 2.457 14. right-tailed test, known = 0.025 n=40 a. -1.96 b. 1.96 c. 2.33 d. 2.021 15. Left-tailed test, known = 0.05 n=7 a. -1.6454 b. 1.6454 c. 1.96 d. 1.943

C. Identify the rejection region and supply its critical value. 16. : =85 : 85 =0.1 n= 29 =unknown a. Left-Tailed, -2.467 b. Right-Tailed, 2.467 c. Two-Tailed, 1.645 d. Two-Tailed, 1.701 17. : =3.5 : >3.5 =0.01 n= 45 =known a. Left-Tailed, -2.467 b. Right-Tailed, 2.33 c. Two-Tailed, 1.645 d. Two-Tailed, 1.701 18. : =50 : 50 =0.02 n=13 =unknown a. Left-Tailed, -2.179 b. Right-Tailed, 2.179 c. Two-Tailed, 3.055 d. Two-Tailed, 2.681 19. : =130 : <130 >

D. Problem Solving: Solve for the t or z value of the following. Write your answer to the nearest thousandth. 21. = 1169.50 =1160.25 = 35 = 112 a. -2.797 b. 2.797 c. 2.797 d. Data insufficient 22. = 3.67 = 3.32 = 1.5 = 71 a. 0.196 b. -0.196 c. 1.966 d. -1.966 23. = 139,267 = 135,358 = 20963 = 100 a. -0.001 b. 0.001 c. -1.865 d. 1.865 24. = 48.90 = 46.78 = 7 = 13 a. -3.937 b. 3.937 c. -1.092 d. 1.092 25. = 234.56 = 233.45 = 3.7 = 40 a. 1.897 b. -1.897 c. 1.897 d. Data insufficient

ps. all the unformation you need to know is already there. thanks!