Statistics and Econometrics Online Practice Exam 4

Test

# Question

1.  Which of the following is not a mathematical average?

A.M

Median

Weighted A.M

Mode

# Question

2. What is the major assumption that one makes when computing a mean from a grouped data ?

All value are discrete

Every value in a class is equal to its mid-point

No value occurs more than once

Each class contains exactly the same number of values

# Question

3. Which index number is used in a situation when one is willing to compare changes in the monetary value of consumption, sale, exports, etc., if a commodity on two or more points of time?

Quantity relatives

Price relatives

Value relatives

Volume relatives

# Question

4. If the mean, median and mode of a data set are equal then, which of the following is true with regard to the distribution of the data ?

It is positively skewed

It is symmetrical

It is asymmetrical

It is negatively skewed

# Question

5. The 50th percentile is-

Mean

Standard deviation

Median

Mean Deviation

# Question

6. Measures of central tendency are called averages

First order

Second order

Third order

None of these

# Question

7. If the arithmetic mean of the ages of a group of boys is 20 years, then the arithmetic mean of their ages after 2 years will be

20 years

18 years

Remains constant

22 years

# Question

8. Which of the following statements is not true?

Arithmetic mean is always the best measure of central tendency

The median of distribution can be determined graphically

The value of mean is least affected by sampling fluctuations

The median can be obtained for open ended distributions

# Question

9. Which of the following statements is/are correct?

1. Average sale of a firm for different years can be better represented by mode.
2. Arithmetic mean is highly affected by extreme values.
3. Sum of absolute deviations from median is minimum.
4. All positional averages are mathematical acreages.

II and III only

I and III only

II and IV only

I and II only

# Question

10. Which of the following statements is incorrect?

Algebraic sum of deviations from arithmetic mean is equal to zero

For a symmetrical distribution, mean = median = mode

For dealing with qualitative data, median is most suitable

None of the above

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