Is it correct to say that in a histogram,the area of each rectangle is proportional to the class size of the corresponding class interval? If not,correct the statement.
(B) The given statement is not correct. In a histogram,the area of each rectangle is proportional to the frequency of its class. If the class intervals are of equal width,the height of the rectangle is proportional to the frequency. If the class intervals are of unequal width,the area of the rectangle is proportional to the frequency.
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The median of the following observations arranged in ascending order is $53 :$ $41, 48, x+1, x+5, 62, 72$. Find $x$.
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View SolutionAfter arranging the observations in ascending or descending order,the observation which is obtained in the middle is called .............. of the data.
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View SolutionIn a diagnostic test in mathematics given to students,the following marks (out of $100$) are recorded:
$46, 52, 48, 11, 41, 62, 54, 53, 96, 40, 98, 44$
Which 'average' will be a good representative of the above data and why?
$46, 52, 48, 11, 41, 62, 54, 53, 96, 40, 98, 44$
Which 'average' will be a good representative of the above data and why?
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View SolutionThe following table gives the frequencies of most commonly used letters $a, e, i, o, r, t, u$ from a page of a book:
Letters $a$ $e$ $i$ $o$ $r$ $t$ $u$ Frequency $75$ $125$ $80$ $70$ $80$ $95$ $75$
Represent the information above by a bar graph.
| Letters | $a$ | $e$ | $i$ | $o$ | $r$ | $t$ | $u$ |
| Frequency | $75$ | $125$ | $80$ | $70$ | $80$ | $95$ | $75$ |
Represent the information above by a bar graph.
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View SolutionThe mean of $10$ observations is calculated as $22.7$. It was later noticed that one observation was taken as $15$ instead of $51$ by mistake. Then,the correct mean of the data is ........
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