MULTIPLE CHOICE Choose the one alternative that best completes the statement or

Question

MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers Provide an appropriate response 1) As part of a Master's thesis project, a mathematics teacher is interested in the effects of two ditt teaching methods on mathematics achievement. She randomly chooses one class of students to learn an algebraic concept using traditional methods and another class of students to learm same algebralc concept using manipulatives. The teacher then compares their test scores Determine whether the samples are dependent or independent A) independent B) 2) 2) Find the standardized test statistic to test the claim that 1P. Assume the two samples are random and independent. Population statistics 1-45 and F2-25 Sample statistics x1 -480, m1 -100 and x2-465, n2-125 A) 1.86 B) 2.81 C)0.91 D) 2. 3) Classify the two given samples as independent or dependent. 3) Sample 1: The scores of 22 students who took the ACT The scores of 22 different students who took the SAT A) independent B) dependent SHORT ANSWER. 4) At = 0.05, test a financial advisor's claim that the difference between the mean dividend 4) rate for listings in the NYSE market and the mean dividend rate for listings in the NASDAQ market is more than 0.75. Assume the two samples are random and independent. State Ho &Hay; State claim, Show P-value, Reject or FTR TR NYSE n1-30 x1-2.75% 1°1.14% NASDAQ n2 50 x2-1.66% 2 = 0.63% Ha: p= 7.390+005 at 5%dthere isn enoughinfo TO Support MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 5) Construct a 95% confidence interval for 1-12. Assume the two samples are random and independent. The sample statistics are given below. Population statistics: 1 = 1.5 and 2 = 1.9 Sample statistics: x1 = 25, n1 = 50 and x2 = 23, n2-60 A) (1.364, 2636) B) (1.919, 3.142) C) (1.723,3.012) D) (1.572, 2987)

Explanation / Answer

Q 7 Since the Population variances are not equal,

the degrees of freedom is = minimum (n1-1, n2-1) = min( 17, 12) = 12

For right tailed test, and 12 df at 0.01 level of significance, the critical value of t is 2.681

Answer: Option B) is correct

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