SSC CGL Statistics – Collection, Classification & Presentation of Data – Level 1 · Warm-up

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SSC CGL Statistics – Collection, Classification & Presentation of Data – Level 1 · Warm-up – 12 questions, subject: Statistics (Tier II Paper II). Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
Data collected by an investigator for the first time, for the purpose of his own enquiry, are called:

Correct Answer: C [Primary data]

Explanation:

First-hand data collected for the present enquiry = primary data.

2.  
In which method of collecting primary data do trained persons carry the form, ask the questions and fill in the answers themselves?

Correct Answer: A [Schedules filled by enumerators]

Explanation:

A schedule is filled by the enumerator after questioning the informant.

3.  
What is the class mark of the class 45–55?

Correct Answer: D [50]

Explanation:

Answer: 50. (45 + 55)/2 = 50.

4.  
The inclusive classes are 10–19, 20–29, 30–39. What are the class boundaries of 20–29?

Correct Answer: B [19.5–29.5]

Explanation:

Gap 1 → subtract and add 0.5: 19.5–29.5.

5.  
What is the width of the inclusive class 60–69 in the series 50–59, 60–69, 70–79?

Correct Answer: C [10]

Explanation:

Width = 69.5 − 59.5 = 10 (difference of boundaries, not 69 − 60).

6.  
In a pie diagram, what angle represents 20% of the total?

Correct Answer: B [72°]

Explanation:

Answer: 72°. 20 × 3.6° = 72°.

7.  
Which one of the following is a continuous variable?

Correct Answer: A [Weight of a new-born baby]

Explanation:

Weight can take any value in a range; the others are counts (discrete).

8.  
In a statistical table, the row headings are called:

Correct Answer: D [Stubs]

Explanation:

Row headings = stubs; column headings = captions.

9.  
In a histogram, the frequency of a class is always proportional to which feature of its rectangle?

Correct Answer: D [Area]

Explanation:

Area ∝ frequency; height ∝ frequency only when widths are equal.

10.  
The less-than ogive and the more-than ogive of a distribution intersect at a point whose x-coordinate is the:

Correct Answer: C [Median]

Explanation:

At the crossing, half the values lie below and half above – the median.

11.  
Statement-basedWhich of the following is/are correct?
I. A questionnaire is filled in by the informant himself.
II. A schedule cannot be used when informants are non-literate.

Correct Answer: B [Only I]

Explanation:

I is correct. II is wrong – the enumerator fills the schedule, so it works for non-literate informants.

12.  
Match the followingMatch the variable with its scale of measurement:
P. Blood group Q. Rank in a class R. Temperature in °C S. Monthly income
1. Ratio 2. Interval 3. Nominal 4. Ordinal

Correct Answer: A [P-3, Q-4, R-2, S-1]

Explanation:

Labels only = nominal; order = ordinal; °C has no true zero = interval; income has a true zero = ratio.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Statistics (Tier II Paper II) book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-statistics

📘 SSC CGL 2026 – Statistics (Tier II Paper II)
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