From the given information prepare the frequency table showing the value of $x_{i} f_{i}$ .
IQ
$(x_{i})$ No. of students
$(f_{i})$
$70 - 80$ $7$
$80 - 90$ $16$
$90 - 100$ $20$
$100 - 110$ $17$

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Solution

Class Interval
(IQ) Frequency $(f_{i})$
No. of students Class Mark
$(x_{i})$ $(x_{i} f_{i})$
$70 - 80$ $7$ $75$ $525$
$80 - 90$ $16$ $85$ $1360$
$90 - 100$ $20$ $95$ $1900$
$100 - 110$ $17$ $105$ $1785$

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Similar questions

Q. The frequency distribution of IQ (Intelligent Quotient) of 80 candidates is given below.

IQ	70-80	80-90	90-100	100-110	110-120	120-130	130-140
No. of candidates	7	16	20	17	11	7	2

Find the median IQ of the candidates.

Q. 45 students across the different levels of Intelligent Quotient are distributed in the grouped table given below.

IQ	60-70	70-80	80-90	90-100	100-110	110-120	120-130
Students	3	6	5	9	11	7	2

Draw the frequency polygon for the data.

Q. 45 students across the different levels of Intelligent Quotient are distributed in the grouped table given below.

IQ	60-70	70-80	80-90	90-100	100-110	110-120	120-130
No. of patients	3	6	9	11	11	7	2

Draw the frequency polygon for the data.

The median for the data is :

$\begin{matrix} IQ & 60 - 70 & 70 - 80 & 80 - 90 & 90 - 100 & 100 - 110 & 110 - 120 & 120 - 130 No. of pupils & 2 & 3 & 5 & 16 & 14 & 13 & 7 \end{matrix}$

Q. The mode for the given data is ___ .

\begin{matrix} IQ & 60 - 70 & 70 - 80 & 80 - 90 & 90 - 100 & 100 - 110 & 110 - 120 & 120 - 130 No. of pupils & 2 & 3 & 5 & 16 & 14 & 13 & 7 \end{matrix}

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IQ $(x_{i})$	No. of students $(f_{i})$
$70 - 80$	$7$
$80 - 90$	$16$
$90 - 100$	$20$
$100 - 110$	$17$

Class Interval (IQ)	Frequency $(f_{i})$ No. of students	Class Mark $(x_{i})$	$(x_{i} f_{i})$
$70 - 80$	$7$	$75$	$525$
$80 - 90$	$16$	$85$	$1360$
$90 - 100$	$20$	$95$	$1900$
$100 - 110$	$17$	$105$	$1785$

From the given information prepare the frequency table showing the value of xifi.IQ (xi)No. of students(fi)70−80780−901690−10020100−11017

Class Interval(IQ) Frequency (fi)No. of students Class Mark(xi) (xifi)70−8077552580−901685136090−10020951900100−110171051785

From the given information prepare the frequency table showing the value of $x_{i} f_{i}$ .
IQ
$(x_{i})$ No. of students
$(f_{i})$
$70 - 80$ $7$
$80 - 90$ $16$
$90 - 100$ $20$
$100 - 110$ $17$

Class Interval
(IQ) Frequency $(f_{i})$
No. of students Class Mark
$(x_{i})$ $(x_{i} f_{i})$
$70 - 80$ $7$ $75$ $525$
$80 - 90$ $16$ $85$ $1360$
$90 - 100$ $20$ $95$ $1900$
$100 - 110$ $17$ $105$ $1785$