STATISTICS (CDS)

Total Questions: 63

1. (Questions 1 and 2) Read the following frequency distribution for two series of observations and answer the given question in below.

What is the mean of frequency distribution of Series-I?

Correct Answer: (c) 37.6
Solution:

2. What is the mode of the frequency distribution of Series-II?

Correct Answer: (c) 46
Solution:

3. (Questions 3) Read the following information and answer the given question in below.

Let the distribution of number of scooters of companies X and Y sold by 5 showrooms (A, B, C, D and E) in a certain year be denoted by S1 and the distribution of number of scooters of only company X sold by the five show-rooms in the same year be denoted by S2.

Number of scooters of company Y sold by showroom E is what per cent of the number of scooters of both companies sold by showroom C ?

Correct Answer: (c) 55
Solution:

4. Consider the following grouped frequency distribution

If the mean of the above data is 25.2, then what is the value of p?

Correct Answer: (c) 11
Solution:


5. Consider the following frequency distribution

What is the median for the distribution?

Correct Answer: (c) 8
Solution:

6. Diagrammatic representation of data includes which of the following?

1. Bar-diagram
2. Pie-diagram
3. Pictogram

Select the correct answer using the code given below

Correct Answer: (d) 1, 2 and 3
Solution:Diagrammatic representation of data includes
1. Bar-diagram
2. Pie-diagram
3. Pictogram
Option (d) is correct.

7. The data collected from which one of the following methods is not a primary data?

Correct Answer: (d) from published thesis
Solution:The data collected from published thesis is not a primary data. Option (d) is correct.

8. The monthly expenditure of a person is ₹6000. The distribution of expenditure on various items is as follows

If the above data is represented by a percentage bar-diagram of height 15 cm, then what are the lengths of the two segments of the bar-diagram corresponding to education and miscellaneous, respectively?

Correct Answer: (b) 1.2 cm and 4.15 cm
Solution:

9. If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations?

Correct Answer: (a)
Solution:

10. Which one of the following pairs is correctly matched?

Correct Answer: (a) Median = Graphical location
Solution:Median is graphical location. Then, Option (a) is correct.