Variance and Standard Deviation Multiple Choice Questions with Answers – PDF Download

MCQ 1: If total sum of square is 20 and the sample variance is 5 then total number of observations are:

1. 15
2. 25
3. 4
4. 35

MCQ 2: In manufacturing company, the number of employees in unit A is 40, the mean is USD $6400 and the number of employees in unit B is 30 with the mean of Rs. 5500 then the combined arithmetic mean is:

1. 9500
2. 8000
3. 7014.29
4. 6014.29

MCQ 3: If the calculated value of total sum of squares in sample variance is larger than the variation in data set is considered as:

1. smaller
2. greater
3. zero
4. negative

MCQ 4: The undesirable consequences which causes the estimated population variance to appear less as compared to real results are classified as:

1. undesired error
2. bias
3. non-calculate error
4. non-zero error

MCQ 5: The formula in which Σ(x-x‾)² is divided by one less than number of observations in sample is classified as:

1. coefficient of deviation
2. mean variance
3. sample variance
4. population variance