Question

Following are the marks scored by the students of grade 10th

in the mathematics test. Prepare a grouped frequency

distribution table with class width 4 and find the mean,

median and mode of the data. Interpret the three measures of

central tendency.

19, 19, 18, 9, 19, 14, 17, 12, 11, 13, 17, 18, 17, 20, 17, 17,

15, 20, 13, 15, 12, 16, 18, 15, 15, 18, 19, 20, 20, 20, 9, 7, 7,

15, 19, 20, 13, 19, 16, 18, 13​

Answer 1

the median is 19+20

=39

the mode is 19