In a study of diabetic patients in a village, the following observations were noted:
Age in years $10 - 20$ $20 - 30$ $30 - 40$ $40 - 50$ $50 - 60$ $60 - 70$
No. of patients $2$ $5$ $12$ $19$ $9$ $3$
Calculate the mean and standard deviation. Also interpret the results

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Solution

$¯ x = \frac{\sum F x}{\sum F} = 34.8$
$σ = \sqrt{\frac{\sum F {(x_{i} - ¯ x)}^{2}}{\sum F - 1}} = \sqrt{\frac{9650}{49}} = 14.033$

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Q. In a study of diabetic patients in a village, the following observations were noted.

Age in years	10−20	20−30	30−40	40−50	50−60	60−70
Number of patients	2	5	12	19	9	4

Represent the above data by a frequency polygon.

Q. In a study of diabetic patients in a village, the following observations were noted.

\begin{matrix} Age in years & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 Number of patients & 2 & 5 & 12 & 19 & 9 & 4 \end{matrix}

Represent the above data by a frequency polygon.

In a study of diabetic patients in a village, the following observations were noted.
$\begin{matrix} Age in years & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 Number of patients & 2 & 5 & 12 & 19 & 9 & 4 \end{matrix}$
Represent the above data by a frequency polygon.

Age (in years)	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$
No. of patients	$60$	$42$	$55$	$70$	$53$	$20$

The following table shows ages of

300

patients getting medical treatment in a hospital on a particular day. Find the median.

Q. The age (in years) of

150

patients getting medical treatment in a hospital in a month are given below. Obtain its mode.

Age (yrs)	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$
No. of patients	$12$	$14$	$36$	$50$	$20$	$18$

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In a study of diabetic patients in a village, the following observations were noted:Age in years10−2020−3030−4040−5050−6060−70No. of patients25121993Calculate the mean and standard deviation. Also interpret the results

¯x=∑Fx∑F=34.8σ=√∑F(xi−¯x)2∑F−1=√965049=14.033

In a study of diabetic patients in a village, the following observations were noted:
Age in years $10 - 20$ $20 - 30$ $30 - 40$ $40 - 50$ $50 - 60$ $60 - 70$
No. of patients $2$ $5$ $12$ $19$ $9$ $3$
Calculate the mean and standard deviation. Also interpret the results

$¯ x = \frac{\sum F x}{\sum F} = 34.8$
$σ = \sqrt{\frac{\sum F {(x_{i} - ¯ x)}^{2}}{\sum F - 1}} = \sqrt{\frac{9650}{49}} = 14.033$