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(D) The median divides a data set into two equal halves. In statistical terms: $1$. The $50^{th}$ percentile $(P_{50})$ represents the value below whi

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Lower quartile

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(D) The median divides a data set into two equal halves. In statistical terms: $1$. The $50^{th}$ percentile $(P_{50})$ represents the value below which $50\%$ of the data falls,which is the median. $2$. The $5^{th}$ decile $(D_5)$ represents the $50^{th}$ percentile,which is the median. $3$. The $2^{nd}$ quartile $(Q_2)$ represents the $50^{th}$ percentile,which is the median. $4$. The lower quartile $(Q_1)$ represents the $25^{th}$ percentile,which is not equal to the median. Therefore,the correct option is $(d)$.

Which of the following,in the case of discrete data,is not equal to the median?

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Size of Item	$1$	$2$	$3$	$4$	$5$	$6$	$7$
Frequency	$2$	$4$	$5$	$8$	$7$	$3$	$2$