16. Refer to to Prob There is a lcm 2. What is the conclusion that can be reache

Question

16. Refer to to Prob There is a lcm 2. What is the conclusion that can be reached about the difference in the scores between the two classes? (Use a.05 level of significance.) average f 2. a. signi between the tisticlly significant difference in the average final examination scores b. There is between the two classes. S no statistically significant difference in the average final examination scores t is impossible to make a decision on the basis of the information given. d. is a difference, but it is not significant. random variable for a chi-square distribution may assume a. any value between-1 to 1 b. any negative value any value greater than zero c. d. 18. The value of Foo with 9 numerator and 20 denominator degrees of freedom is a. 2.39 b. 2.94 c. 2.91 d. 3.46 19. The sampling distribution of p,-9, is approximated by a a. normal distribution b. t-distribution with ni + n2 degrees of freedorm c. t-distribution with ni + no -1 degrees of freedom d. t-distribution with ni + n2 + 2 degrees of freedom Problem 3 The results of a recent poll on the preference of teenagers on the types of music they listen to are shown Teenagers Favoring 384 Music Type Pop Rap Teenagers Surveyed 800 900 450 Refer to Problem 3. An estimate for the difference between the proportions is a. -0.02 b. 0.048 c. 100 d. 66 20. 21. Refer to Problem 3. The standard error of p, P, is a. 0.48 b. 0.50 c. 0.03 d. 0.0243 Referto Problem 3 The 95% confidence interval for the difference between the two proportions is a. 384 to 450 b. 0.48 to 0.5 c. 0.028 to 0.068 d. 22. -0.068 to 0.028 23. We are interested in testing whether the variance of a population is significantly less than 1.44. The nul hypothesis for this test is Ho:02

Explanation / Answer

Q 17 Answer: Option D) is correct, (chi square value cannot be negative)

Q 18 Answer : F0.01(9,20) is 3.46. Option D)

Q 19 Answer: Option a) normal distribution

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