Question

Multiple choice questions 1. Which of the following correctly describes the difference between paired and independent sample data? A) Independent samples operate based on a known o, whereas paired samples may operate with a sample standard deviation. B) Independent samples are used to address the difference between two separate populations, whereas paired samples involve a matched analysis. C) Independent samples incorporate at distribution, whereas paired samples may use the z distribution for approximation. D) Independent samples always have the same sample size, whereas paired samples may compare groups with different sample sizes. 2. Which of the following observes a comparison between two independent samples? A) The comparison between performance on a board certification exam prior to, and post implementation of a new preparation program among a group of surgeons. B) Observing the difference in fasting glucose levels between a group of individuals receiving a new study drug and a group receiving a placebo. C) Determination if a SRS of children in a classroom is performing up to a particular level on a new standardized exam. 3. Which of the following does not observe a comparison between two independent samples? A) Observation of the difference in forced vital capacity between a group of children living in a home with above a specific level of mold and a group of children living in a home with no mold. B) Determining if a group of patients receiving a novel vaccine for Hepatitis C are treated versus those receiving best standard of care. C) Determining the difference in performance on an academic exam in a SRS of children matched on a variety of various characteristics. 4. Which of the following is not required for two-sample procedures? A) Independence within samples B) Independence between groups C) Both samples should be taken from an SRS or equivalent D) Normality for at least one of the samples 5. When is it not appropriate to assume equal variances in a population? A) When the populations' standard deviations are slightly different. B) When the results following the hypothesis test with a null hypothesis Oi=02 conclude in a p-value less than 0.05 C) It is almost always appropriate to assume equal variances D) Whenever the variances are different by more than 10% 6. Suppose a researcher is interested in the effectiveness of a new therapy at reducing scores on the global depression scale (GDS). Assume that an effective change in the GDS scale between placebos and treatment groups must be more than 5 points. Which of the following correctly identifies the null and alternative hypotheses for the test for independent means? A) Ho: Mi - U2 = 5. Ha: ui - U2+5 B) Ho: ui – u2 > 5. Ha: ui – u2 = 5 C) Ho: ui - ul2<5. Ha: ui - ul2 = 5 D) Ho: ui - U2 = 5, Ha: ui - U2 >

Answer 1

1.B is correct.

2.B is correct.

3.C is correct.

4.A is correct

5.B is correct.

6.D is correct.

If there is any understanding problem regarding this please feel free to ask any doubt in comment box. Thanks.