Tag: statistics

Questions Related to statistics

Class mark of a particular class is 10.5 and class size is 7, then class interval is :

  1. 10.5 -17.5

  2. 3.5 -10.5

  3. 7 -17.5

  4. 7 -14


Correct Option: D
Explanation:

Class mark is the mid point of the class interval. 

Class size is the upper limit minus lower limit.
Given that class mark of a class is $10.5$ and 

class size is $7$
By option verification,
Opition A class mark is $\dfrac{10.5+17.5}{2}=\dfrac{28}{2}=14$ False

Option B class mark is $\dfrac{10.5+3.5}{2}=\dfrac{14}{2}=7$ False

Option C class mark is $\dfrac{17.5+7}{2}=\dfrac{24.5}{2}=12.25$ False

Option D class size is $14-7=7$ and
Class mark is $\dfrac{14+7}{2}=\dfrac{21}{2}=10.5$ True

Therefore the class interval is $7-14$

The information invariably required to be put in a good statistical table is/are ___________.

  1. Descriptive thinking

  2. Table number

  3. Head note

  4. Both b&c


Correct Option: D

If upper limit of one class coincides with the lower limit of another class. It is known as __________.

  1. exclusive class intervals

  2. inclusive class intervals

  3. interval

  4. nominal


Correct Option: A

"An average is a value which is typical or representative of a set of data". This definition is given by.

  1. Croxton and Cowden

  2. Simpson and Kafka

  3. Clark and Sekkade

  4. Murry R. Spiegal


Correct Option: D

The formulae of CAPABILITY is __________.

  1. C = F (TA, IS, S)

  2. C = Capabilities (TA + IA)

  3. None of these

  4. All of these


Correct Option: A

A measure of central tendency means
I. Representative of a set of data.
II. A single figure which is representative of whole distribution.
III. An average of a distribution.
Which of the following is correct answer?

  1. I

  2. II

  3. III

  4. All of the above


Correct Option: D

_______ of data refers to the table where data are classified on the basis of single characteristics.

  1. Complex Tabulation

  2. Reference Tabulation

  3. Simple Tabulation

  4. Specific Tabulation


Correct Option: C

The runs scored by two teams.

Over Team $A$ Team $B$
$0-6$ $2$ $5$
$6-12$ $1$ $6$
$12-18$ $8$ $2$
$18-24$ $9$ $10$
$24-30$ $4$ $5$
$30-36$ $5$ $6$
$36-40$ $6$ $3$
  1. $4,1$

  2. $3,2$

  3. $5,5$

  4. $7,2$


Correct Option: A

In _________ classification time becomes the classifying variable and data are categorized according to time.

  1. spatial

  2. quantitative

  3. qualitative

  4. temporal


Correct Option: D
Explanation:

Temporal classification of data refers to categorization of data on the basis of varying time-periods of which the data has been collected. This classification is thus useful for classification of time-series data according to time.

In _____ presentation, data are described within the text.

  1. textual

  2. tabular

  3. graphical

  4. both B and C


Correct Option: A