Q11 of 26 Page 14

Following are the ages of 360 patients getting medical treatment in a hospital on a day:


Construct a cumulative frequency distribution.

To Find: Cumulative frequency distribution

Given: Ages of 360 patients getting medical treatment on a day.


Concept Used: Cumulative frequency up to a point is the sum of all previous frequencies up to that point.


Explanation:


Now, for making a frequency distribution,



Now, the cumulative frequency table looks like:



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Find out the mode of the following marks obtained by 15 students in a class:

Marks: 4, 6, 5, 7, 9, 8, 10, 4, 7, 6, 5, 9, 8, 7, 7.

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Given below are the cumulative frequencies showing the weights of 685 students of a school. Prepare a frequency distribution table.

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The mean of 200 items was 50. Later on, it was discovered that the two items were misread as 92 and 8 instead of 192 and 88. Find the correct mean.

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The following data on the number of girls (to the nearest ten) per thousand boys in different sections of Indian society is given below:


(i) Represent the information above by a bar graph.


(ii) In the classroom discuss what conclusions can be arrived at from the graph.