The height of a group of six persons are 172cm, 173cm, 175cm, 165cm, 170cm,180cm (a) Find the mean height of the persons of the group. (b) What is the range of heights of the group? (c) If two persons with heights of 172 cm and 181 cm join the group, what will be the mean height and range of the new groups?
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Answer:
a. 172.5
b. 15
c. 173.5, range = 16
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