Statistics Model Questions Set 1 Section-Wise Topic Notes With Detailed Explanation And Example Questions
MOST IMPORTANT quantitative aptitude - 1 EXERCISES
The following question based on Statistics topic of quantitative aptitude
(a) A pictograph
(b) A histogram
(c) An ogive
(d) A pie chart
The correct answers to the above question in:
Answer: (d)
In statistics, a suitable graph for representing the partitioning of total into sub parts is a pie chart.
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Read more model question set 1 Based Quantitative Aptitude Questions and Answers
Question : 1
Consider the following statements in respect of a histogram:
I. The histogram consists of vertical rectangular bars with a common base such that there is no gap between consecutive bars.
II. The height of the rectangle is determined by the frequency of the class it represents.
Which of the statements given above is/are correct?
a) Only II
b) Both I and II
c) Only I
d) Neither I nor II
Answer »Answer: (b)
Statement I :
A graph which displays the data by using vertical bars of various heights in rectangular shapes to represent frequencies. Such that there is no gap between consecutive bars and also the height of the rectangle.
Statement II :
The height of the rectangle is determined by the frequency of the class it represents.
So, both the statements are correct.
Question : 2
The arithmetic mean of 10 numbers was computed as 7.6. It was later discovered that a number 8 was wrongly read as 3 during the computation. What should be the correct mean?
a) 7.6
b) 8.1
c) 7.1
d) 8.6
Answer »Answer: (b)
Correct A.M. = ${n \ov{x} - \text"(Sum of wrong observations) + (Sum of correct observations)"}/n$
= ${10 × 7.6 - 3 + 8}/{10} = {81}/{10}$ = 8.1
Question : 3
Read the following information and answer the four items that follow .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 showrooms in the same year be denoted by S2
Showroom | A | B | C | D | E | Total number of scooters sold |
S1 (in%) | 19 | 21 | 15 | 33 | 12 | 6400 |
S2(in%) | 24 | 18 | 20 | 30 | 8 | 3000 |
a) 54
b) 55
c) 52
d) 56
Answer »Answer: (b)
No. of scooters of Y sold by E
= 12% × 6400 – 8% × 3600
= 528
No. of total scooters by showroom
c = 15% × 6400 = 960
Reqd. % = ${528}/{960}$ × 100 = 55%
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Statistics Model Questions Set 1
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