20. How is the expected length of a confidence interval related to the margin of error? 0 A. The expected length is half the margin of error. B. The expected length is twice the margin of error. the margin of error. D. The expected length is two more 0 C. The expected length is equal to 0 than the margin of error. 19. A certain sample whose size is 10 is known to have a mean of 73.25 with a standard deviation of 2.5. Which of the following gives the interval estimate for the population mean with 95% confidence? Formula: 1? + tag: (i) '1 F 4 f _ til/2 (5H) O A. 71452 4-. 0 4 75.033 0 3.71.439 4 p, 4-. 75.011 0 c. 70531 4-. u 4 75319 O 0. 71.301 4 ,0 4 74.599 18. A certain sample whose size is 10 is known to have a mean of 73.25 with a standard deviation of 2.5. 18. Find tot/2 for a 95% confidence interval. 17. From a finite population of N=10, the number of samples of size n=5 that can be drawn is N! . N _ (Formula. \"C n!(N!n!)) 15. The size of a sample is 19. What is the degrees of freedom? 16. Which of the following refers to the number of values that can vary in a certain analysis or computation? O A. confidence level 0 B. degrees of freedom 13. In a probability distribution, the sum of all the probabilities must be equal to 14. From a finite population of N=7, the number of samples of size n=3 that can be drawn is N! .N _ (Formula. \"C n!(N!n!)) \f12. It refers to the numbers that summarize data for entire population. 0 A. Parameter O B. Statistic O C. Random sampling 0 D. Mean 9. Letx = 8 be a Normal random variable with parameters u = 1 and o = 3. Convert it to Z-score (Formula: z x-u O A. 1.325 O B. 5.322 O c. O O D. 2.33310. In normal distribution. define the relationship of the mean. median and the mode 0 A. Mean = median = mode 0 B. Mean :w median :- mode 0 C. Mean a: median -=: mode 0 D. No relation found 7. Consider the given discrete probability distribution. Find the value of mean (,u) \f5. Consider the given discrete probability distribution. Find the probability that M equals 5. 6. If the value of a variance 0^2 = 144, what is the value of a standard deviation o? O A. 15 O B. 13 O C. 14 O D. 123. Three coins are tossed. and the random variable Y gives the number of tails. What could be the values of random variable Y? 4. The sum of the product of each value of a discrete random variable X and its probability is referred as its 0 A. standard deviation 0 B. variance 0 C. mean 0 D. variables