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Twenty students of Class XI have secured the following marks : Present the data as a frequency array.

Answer» <html><body><p></p>Solution :Following table presents these data in the form of a frequency array. The table shows that 3 students secured 11 marks, 4 students secured <a href="https://interviewquestions.tuteehub.com/tag/14-272882" style="font-weight:bold;" target="_blank" title="Click to know more about 14">14</a> marks, again 4 students secured 20 marks, and the like.As it is <a href="https://interviewquestions.tuteehub.com/tag/clear-408920" style="font-weight:bold;" target="_blank" title="Click to know more about CLEAR">CLEAR</a> from the table, in such series the items are arranged in the <a href="https://interviewquestions.tuteehub.com/tag/ascending-885487" style="font-weight:bold;" target="_blank" title="Click to know more about ASCENDING">ASCENDING</a> (or descending) order. Frequencies are noted infront of each item to signify the number of times that the itemoccurs in the series. In this table, the marks secured are shown in ascending order. Against these marks are shown their frequencies,that is, the number of students who have secured these marks. <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/TRJ_ECO_XI_C04_S01_001_S01.png" width="80%"/> <br/> Thus, 3 is the frequency for 11, so 3 is written against it. This means 11 is occurring 3 times in the series, or 3 students have secured 11 marks. Likewise, <a href="https://interviewquestions.tuteehub.com/tag/5-319454" style="font-weight:bold;" target="_blank" title="Click to know more about 5">5</a> is written against <a href="https://interviewquestions.tuteehub.com/tag/17-278001" style="font-weight:bold;" target="_blank" title="Click to know more about 17">17</a>, 5 is the frequency of 17 or 5 students have secured 17 marks. <br/> Discrete series present the data in a very brief form. However, this type of presentation of the data becomes difficult when there is a large mass of data and a large number of small frequencies. In such situations, data are to be distributed in different classes.</body></html>


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