MCQ on Research Methodology with answer key - PART - 6

 

MCQ on Research Methodology 

with answer key - PART - 6

1. If two groups of numbers have the same mean, then

  A) their modes must also be equal  
B) their medians must also be equal
C) their standard deviations must also be equal
D) None of these alternatives is correct

... Answer is : D) None of these alternatives is correct

2. A multiple regression model has the form: y = 2 + 3x1 + 4x2. As x1 increases by 1 unit(holding x2 constant), y will

A) decrease by 4 units
B) increase by 4 units 
C) decrease by 3 units
D) increase by 3 units

... Answer is : D) increase by 3 units

3. A pharmaceutical company claims that its weight loss drug allows women to lose 8.5lb after one month of treatment. If we want to conduct an experiment to determine if the patients are losing less weight than advertised, which of the following hypothesis should be used?

A) D= : F = 8.5; DI : F ? 8.5
B) D= : F = 8.5; DI : F < 8.5
C) D= : F ? 8.5; DI : F < 8.5
D) D= : F ? 8.5; DI : F < 8.5

... Answer is : B) D= : F = 8.5; DI : F < 8.5

4. The multiple correlation coefficient of determination is computed by

A) dividing SSR by SST
B) dividing SST by SSR
C) dividing SST by SSE
D) None of the these

... Answer is : A) dividing SSR by SST

5. Which of the following is not a required assumption for the ANOVA?

A) At least 3 populations under consideration
B) The random variable of interest for each population has normal distribution
C) The variance associated with the random variable must be the same for each population
D) All of the above are required assumptions

... Answer is : D) All of the above are required assumptions

6. 200 students were tested on their relationship skills before undertaking a personal development session, after which they were tested again. Which statistical test is most relevant to determining whether the personal development course had a significant effect?  .

A) Mann-Whitney 
B) paired samples t test
C) Wilcoxon
D) independent t test 

... Answer is : B) paired samples t test

7. One-way ANOVA is used when:

A) analyzing the difference between two population means
B) analyzing the results from a large sample
C) analyzing the difference between more than two population means
D) analyzing the results of a two-tailed test

... Answer is : C) analyzing the difference between more than two population means

8. A statistical test used to compare 2 or more group means is known as 

A) Z-test
B) Simple regression
C) One-way analysis of variance
D) t-test for correlation coefficients 

... Answer is : C) One-way analysis of variance

9. You would use the paired t test when:

A) you are comparing one group in a before-and-after situation using scale data
B) you are comparing one group in a before-and-after situation using ranked data 
C) you are using a two-tail hypothesis
D) you are comparing two groups that are normally distributed using scale data

... Answer is : A) you are comparing one group in a before-and-after situation using scale data

10. As a general rule, researchers tend to use   percent confidence intervals.

A) 50%
B) 95%
C) 99%
D) None of these

... Answer is : B) 95%