Vidaara.orgClass 11 · Mathematics
CodeVID-M11-WS
Organisation of Data — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
Arranging raw data into groups by common characteristics is called:
- A.Collection
- B.Classification
- C.Interpretation
- D.Sampling
2.
Grouping data by place or region is ____ classification.
- A.Chronological
- B.Geographical
- C.Qualitative
- D.Quantitative
3.
Grouping data by time (year by year) is ____ classification.
- A.Geographical
- B.Chronological
- C.Qualitative
- D.Numerical
4.
Grouping people by literacy (literate/illiterate) is ____ classification.
- A.Quantitative
- B.Qualitative
- C.Chronological
- D.Geographical
5.
A measurable characteristic that takes different values is a:
- A.Constant
- B.Variable
- C.Frequency
- D.Tally
6.
The number of members in a family is a ____ variable.
- A.Continuous
- B.Discrete
- C.Qualitative
- D.Constant
7.
Height of students is a ____ variable.
- A.Discrete
- B.Continuous
- C.Qualitative
- D.Constant
8.
The number of times a value occurs is its:
- A.Class size
- B.Frequency
- C.Mid-point
- D.Range
9.
For the class 30–40, the class size is:
- A.10
- B.30
- C.40
- D.70
10.
For the class 30–40, the mid-point (class mark) is:
- A.30
- B.35
- C.40
- D.70
11.
In which method are both class limits included and gaps appear between classes?
- A.Inclusive method
- B.Exclusive method
- C.Tally method
- D.Sample method
12.
In the exclusive class 20–30, a value of exactly 20 goes into:
- A.10–20
- B.20–30
- C.Both
- D.Neither
13.
The exclusive method is best suited to ____ data.
- A.Discrete
- B.Continuous
- C.Qualitative
- D.Geographical
14.
In a frequency table, the sum of all frequencies equals the:
- A.Number of classes
- B.Number of observations
- C.Largest value
- D.Class size
15.
The running total of frequencies is called the ____ frequency.
- A.Relative
- B.Cumulative
- C.Mid
- D.Class
Section B — Challenge / Olympiad (2 marks each)
10 × 2 = 20 marks
16.
A shoe shop records sizes as 6, 7, 8, 9 (never 7.5). The variable 'shoe size' here is treated as:
- A.Discrete
- B.Continuous
- C.Qualitative
- D.A constant
17.
To draw a histogram, an inclusive table (0–9, 10–19) is first converted to exclusive form (−0.5–9.5, 9.5–19.5) in order to:
- A.Remove the gaps between classes
- B.Add more data
- C.Change the frequencies
- D.Reduce the range
18.
If a frequency table of 50 observations has frequencies adding up to 48, it means:
- A.Two observations were missed or mis-tallied
- B.The table is correct
- C.There are 48 classes
- D.The range is 48
19.
In a class interval of width 10 with lower limit 60, the upper limit and mid-point are:
- A.70 and 65
- B.65 and 70
- C.70 and 60
- D.80 and 70
20.
Classifying data first makes later analysis easier mainly because classification:
- A.Turns a confusing heap of figures into ordered groups
- B.Increases the data
- C.Collects the data
- D.Removes all the data
21.
From the table (0–10:2, 10–20:4, 20–30:5, 30–40:5, 40–50:4), the number scoring 30 or more is:
- A.9
- B.5
- C.14
- D.4
22.
Temperature recorded as 36.6°C, 37.2°C, 38.5°C illustrates a ____ variable.
- A.Continuous
- B.Discrete
- C.Qualitative
- D.Geographical
23.
Cumulative frequency is especially needed later to calculate the:
- A.Median and to draw the ogive
- B.Mode only
- C.Range only
- D.Class size
24.
Which classification base would you use to compare the populations of five different states?
- A.Geographical
- B.Chronological
- C.Qualitative
- D.Quantitative by income
25.
A class interval written as 10–20 in the exclusive method actually covers values from:
- A.10 up to but not including 20
- B.10 and 20 both included
- C.11 to 19 only
- D.20 to 30
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Classification
- (B) Geographical
- (B) Chronological
- (B) Qualitative
- (B) Variable
- (B) Discrete
- (B) Continuous
- (B) Frequency
- (A) 10
- (B) 35
- (A) Inclusive method
- (B) 20–30
- (B) Continuous
- (B) Number of observations
- (B) Cumulative
Section B — Challenge / Olympiad (2 marks each)
- (A) Discrete
- (A) Remove the gaps between classes
- (A) Two observations were missed or mis-tallied
- (A) 70 and 65
- (A) Turns a confusing heap of figures into ordered groups
- (A) 9
- (A) Continuous
- (A) Median and to draw the ogive
- (A) Geographical
- (A) 10 up to but not including 20
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