(D) When data is collected by an investigator from a source that already exists (such as government publications,newspapers,or research reports),it is

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(D) When data is collected by an investigator from a source that already exists (such as government publications,newspapers,or research reports),it is known as secondary data. Primary data,on the other hand,is data collected directly by the investigator for a specific purpose.

Class 9 Mathematics Statistics Mix Examples - Statistics and Probability

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If the information gathered by an investigator is from an already existing source of data,then such information is called .........

A
classes
B
Frequency
C
primary data
D
secondary data

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Class 9 Questions

Class 9

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Statistics

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Mix Examples - Statistics and Probability

$A$ child says that the median of $3, 14, 18, 20, 5$ is $18$. What does the child not understand about finding the median?

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The following is the distribution of the number of employees working on different floors of the six-storey commercial complex:

Floor $1$ $2$ $3$ $4$ $5$ $6$

Number of employees $51$ $48$ $42$ $44$ $48$ $32$

Represent the information above by a bar graph.

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If the mode of the observations $5, 6, 8, 9, 6, 7, 8, 9, 4, 5, 8, 9, x$ and $10$ is $9$,then $x = $ ............

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Ten observations $6, 14, 15, 17, x+1, 2x-13, 30, 32, 34, 43$ are written in an ascending order. The median of the data is $24$. Find the value of $x$.

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Let $m$ be the mid-point and $l$ be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is:

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Floor	$1$	$2$	$3$	$4$	$5$	$6$
Number of employees	$51$	$48$	$42$	$44$	$48$	$32$

If the information gathered by an investigator is from an already existing source of data,then such information is called .........

Similar Questions

$A$ child says that the median of $3, 14, 18, 20, 5$ is $18$. What does the child not understand about finding the median?

The following is the distribution of the number of employees working on different floors of the six-storey commercial complex: Floor $1$ $2$ $3$ $4$ $5$ $6$ Number of employees $51$ $48$ $42$ $44$ $48$ $32$ Represent the information above by a bar graph.

If the mode of the observations $5, 6, 8, 9, 6, 7, 8, 9, 4, 5, 8, 9, x$ and $10$ is $9$,then $x = $ ............

Ten observations $6, 14, 15, 17, x+1, 2x-13, 30, 32, 34, 43$ are written in an ascending order. The median of the data is $24$. Find the value of $x$.

Let $m$ be the mid-point and $l$ be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is:

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The following is the distribution of the number of employees working on different floors of the six-storey commercial complex:

Floor $1$ $2$ $3$ $4$ $5$ $6$

Number of employees $51$ $48$ $42$ $44$ $48$ $32$

Represent the information above by a bar graph.