Question

The weights(in kg) of ten students of a class are
43.5, 49.5, 52, 43, 47, 44.5, 38.5, 40, 47, 38
(i) What is the mean weight?

Answer 1

Answer:

mean weight = (43.5+49.5+52+43+47+44.5+38.5+40+47+38)/10

mean weight = 443/10

= 44.3 kg

Answer 2

Given Information:

• The weights (in kg) of ten students of a class are: 43.5, 49.5, 52, 43, 47, 44.5, 38.5, 40, 47, 38

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Need to find out:

• The mean height = ?

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Solution:

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Formula used here:

${\underline{\boxed{\sf{Mean = \dfrac{Sum\:of\:all\: observations}{Number\:of\: observations} }}}}$

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Putting the values:

$\sf \: Mean \: weight = \dfrac{43.5 + 49.5 + 52 + 43 + 47 + 44.5 + 38.5 + 40 + 47 + 38}{10} \\ \\ \sf \: Mean \: weight = \cancel\dfrac{443.0}{10} \: kg \\ \\ \sf \: Mean \: weight = \boxed { \sf \pink{44.3 \: kg}} \: \star$

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AnswEr:

$\underline{\boxed{\textsf{The required mean weight = {\textbf{44.3 kg}}}}} \qquad\qquad \bigg\lgroup\bold{Hence \ Solved } \bigg\rgroup$

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More Information:

• Data is a collection of numbers together to give some information.

• Data needs to be organised to make it easy to understand and interpret.

• To organise a given data we arrange it either in ascending order or descending order.

• Range is the difference of the highest and the lowest observation.

• Mean, Median, Mode are certain representatives of a given data. They are called measures of central tendency.

• Mean of a number of observations is a sum of all the observations divided by the number of observation.

• Medianis that value of a given number of observations which divides it into exactly two parts.

• Mode is the observation which occurs maximum number of times.