MCQ on Research Methodology 

with answer key - PART - 5

1. Approximately what percentage of scores falls within two standard deviation of the mean in a normal distribution?

  A) 68%   
B) 34% 
C) 95% 
D) 99% 

... Answer is : C) 95%

2. The summary of hourly wages of a sample of 130 system analysts are given below. mean = 60 range = 20    mode = 73 variance = 324 median = 74 The coefficient of variation equals

A) 54%
B) 5.4%
C) 30%
D) 0.30%

... Answer is : C) 30%

3.The standard deviation is

A) An approximate indicator of how numbers vary from mean
B) The square root of variance 
C) A measure of variability
D) All the above

... Answer is : D) All the above

4. Approximately what percentage of scores falls within one standard deviation of the mean in a normal distribution?

A) 99 %
B) 95 %
C) 68 %
D) 34 %

... Answer is : C) 68 %

5. This is the difference between a sample statistic and the corresponding population parameter.

A) Difference error
B) Standard error
C) Sampling error
D) None of the above

... Answer is : C) Sampling error

6. A numerical value used as a summary measure for a sample, such as sample mean, is known as a .

A) sample parameter
B) Population parameter
C) population mean
D) sample statistic 

... Answer is : D) sample statistic 

7. Which of the following symbols represents a population parameter?

A) A
B) s
C) S 
D) r 

... Answer is : C) S 

8. In statistical estimation, more precise estimate is obtained when

A) The data are less variable
B) The sample size is small
C) The standard error is high
D) All the above

... Answer is : A) The data are less variable

9. Which of the following statements is NOT true?

A) The first quartile is equal to the twenty-fifth percentile
B) The median is always greater than the mean
C) In a symmetric distribution, the mean and the median are equal
D) In a symmetric distribution, the median is halfway between the first and the third quartiles

... Answer is : B) The median is always greater than the mean

10. Which of the following is a numerical characteristic of sample?

A) Statistic
B) Population
C) Parameter
D) None of these

... Answer is : A) Statistic