Question
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Answer
Coefficient of Variation $=17.89 \%$
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For a sequence of $100$ observations, the mean and standard deviation are $40$ and $10$ respectively. In calculating these measures, two observations were taken as $30$ and $70$ instead of $3$ and $27$ by mistake. Find the corrected mean and corrected standard deviation.
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→Here, $n=100 ; \overline{ x }=40 ; s=10$
Wrong observation $: 30,70$
True observations $: 3,27$
Obtain an inclusive continuous frequency distribution from the following data.
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Lower boundary point or more than that
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$44.5$
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$49.5$
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$59.5$
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$500$
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$470$
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$390$
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$240$
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$0$
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A person wants to donate ? $2,42,000$ in five months such that every month he donates one-third of the amount he donated in the previous month. Find the amount he donated in the first month.
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