* Prepare a stem and leaf plot for the scores on a recent test:
57, 60, 88, 85, 79, 70, 65, 98, 97, 59, 58, 65, 62, 77, 77, 75, 73, 69, 82, 81. And from the diagram find mean, median and mode.
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mode= 77
median=57+58/2 =115/2
mean= sum of the observations / no.of observations = 57+60+88+85+79+70+65+98+97+59+58+65+62+77+77+75+73+69+82+81/20=
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