Statistical Techniques Additional One Mark Online Test

Statistical Techniques Additional One Mark Online Test (12th Standard Geography)

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According to the lesson Statistical Techniques, statistics is a branch of science which deals with

A.qualitative data only B.quantitative data C.rock formations D.population migration

Arrange the four processes included in statistics in the order given in the lesson.
1. Analysis of data
2. Collection of data
3. Interpretation of data
4. Presentation of data

A.2, 4, 1, 3 B.2, 1, 4, 3 C.4, 2, 1, 3 D.2, 4, 3, 1

The language spoken by a person, such as Tamil, Telugu, Hindi or English, is an example of

A.quantitative data B.secondary data C.qualitative data D.grouped data

Statistical material which the investigator collects by going from door to door for the purpose of his or her study is called

A.secondary data B.published data C.grouped data D.primary data

Which of the following statements about types of data is/are correct?
1. Qualitative data gives a numerical value to the item.
2. Secondary data are already collected and recorded data taken from published or unpublished sources.
3. Marks obtained such as 45, 70 and 60 are quantitative data.

A.1 only B.1 and 2 only C.2 and 3 only D.1, 2 and 3

Find the odd one out with respect to the methods of primary data collection.

A.Direct personal investigation B.Indirect oral investigation C.Published sources D.Questionnaire method

What is the range of the data 2, 6, 4, 9, 12, 8, 5, 8?

A.8 B.12 C.6 D.10

When numerical raw data is arranged in ascending or descending order, it is called

A.an array B.a class C.a tally D.a range

An arrangement of data into classes is known as

A.range B.frequency distribution C.array D.median

Q10

While using tally marks, how is the fifth observation in a group shown?

A.By a fifth vertical bar B.By a circle around four bars C.By a cross stroke over the four bars D.By starting a new column

Q11

Match the terms with their meanings.
a) Class limit - i) Aggregate of all class frequencies
b) Midpoint - ii) Extreme values of a class
c) Class interval - iii) Sum of the lower and upper limits divided by 2
d) Total frequency - iv) Difference between the upper and lower limits
Codes give the matches for a, b, c, d in order.

A.iii, ii, iv, i B.ii, iii, i, iv C.ii, iii, iv, i D.iv, iii, ii, i

Q12

What is the midpoint of the class 40 - 50?

A.10 B.45 C.40 D.90

Q13

Assertion (A): The average is frequently referred to as a measure of central tendency.
Reason (R): Since an average represents the entire data, its value lies somewhere between the largest and the smallest observation.

A.Both A and R are true and R is the correct explanation of A B.Both A and R are true but R is not the correct explanation of A C.A is true but R is false D.A is false but R is true

Q14

Find the odd one out with respect to the types of averages given in the lesson.

A.Mean B.Median C.Mode D.Range

Q15

The value obtained by dividing the sum of the values of all the given items by the number of items is also called the

A.assumed mean B.arithmetic mean C.median D.modal class

Q16

The twelve monthly average temperatures of Cuddalore district add up to 341.09 °C. What is the mean annual temperature?

A.31.01 °C B.34.11 °C C.28.42 °C D.29.34 °C

Q17

In the formula for the mean of grouped data, \( \bar{X} = A + \frac{\Sigma fd}{N} \times i \), what does A stand for?

A.Assumed mean B.Area of the class C.Arithmetic total D.Actual frequency

Q18

In finding the mean of grouped data, the assumed mean A = 25 and the class size i = 10. What is the deviation d for the class 40 - 50, whose midpoint is 45?

A.20 B.2 C.4.5 D.-2

Q19

For the heights of plants in a garden, A = 25, \( \Sigma fd = 50 \), N = 50 and i = 10. Using \( \bar{X} = A + \frac{\Sigma fd}{N} \times i \), the mean height is

A.26 cm B.50 cm C.25 cm D.35 cm

Q20

Which measure of central tendency is the middle value of a series arranged in ascending or descending order?

A.Mean B.Mode C.Median D.Range

Q21

Twelve monthly temperatures are arranged in ascending order. Using M = value of the \( \left(\frac{N+1}{2}\right) \)th item, the median is

A.the value of the 6th item B.the value of the 7th item C.the average of the 6th and 7th items D.the average of the 1st and 12th items

Q22

The monthly average rainfall (mm) of Chennai district is 15.54, 10.44, 12.48, 20.96, 57.1, 41.24, 64.4, 99.28, 147.17, 204.22, 165.07 and 133.76. What is the median rainfall?

A.49.17 mm B.60.75 mm C.52.82 mm D.64.4 mm

Q23

In the exercise data of Chennai's monthly rainfall, the highest value is 204.22 mm (October) and the lowest is 10.44 mm (February). What is the range?

A.193.78 mm B.188.68 mm C.214.66 mm D.107.33 mm

Q24

In the formula for the median of grouped data, \( \text{Median} = l + \frac{\frac{N}{2} - m}{f} \times c \), what does m stand for?

A.Frequency of the median class B.Midpoint of the median class C.Lower limit of the median class D.Cumulative frequency of the class preceding the median class

Q25

The value which occurs most frequently in a set of observations is called the

A.mean B.median C.mode D.range

Q26

Daily wages and number of workers: 0-10: 3, 10-20: 5, 20-30: 7, 30-40: 10, 40-50: 12, 50-60: 15, 60-70: 12, 70-80: 6, 80-90: 2, 90-100: 8. Which is the modal class?

A.40 - 50 B.50 - 60 C.60 - 70 D.90 - 100

Q27

In the formula for the mode of grouped data, \( \text{Mode} = l + \frac{f_1 - f_0}{2f_1 - f_0 - f_2} \times c \), what does \( f_2 \) stand for?

A.Frequency of the class preceding the modal class B.Frequency of the modal class C.Frequency of the class succeeding the modal class D.Total of all frequencies

Q28

For a modal class 50 - 60, l = 50, \( f_1 = 15 \), \( f_0 = 12 \), \( f_2 = 12 \) and c = 10. Using \( \text{Mode} = l + \frac{f_1 - f_0}{2f_1 - f_0 - f_2} \times c \), the mode is

A.55 B.53 C.60 D.57.5

Q29

Monthly income of workers (in thousands) and number of persons: 15-25: 6, 25-35: 11, 35-45: 7, 45-55: 4, 55-65: 4, 65-75: 2, 75-85: 1. Which is the modal class?

A.15 - 25 B.35 - 45 C.25 - 35 D.45 - 55

Q30

Annual rainfall (cm) and area (sq.m): 0-25: 300, 25-50: 460, 50-75: 650, 75-100: 730, 100-125: 1200, 125-150: 1900, 150-175: 1500, 175-200: 660. N = 7400. Which is the median class?

A.100 - 125 B.125 - 150 C.150 - 175 D.75 - 100

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This free online practice test covers Statistical Techniques from the 12th Standard Geography (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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