Marks: 13, 16, 14, 9, 18, 11, 7, 10, 12, 20
11. Find the arithmetic mean of the monthly income of 6 labourers which are * 70, 7 42, * 85, 75, 768, 55.
12.
(i) Find the range for the following observations: 65, 70, 82, 59, 81, 76, 67, 60, 65 and 50.
(ii) What do you mean by a measure of central tendency? Mention different type of averages.
13. Calculate median of the following data: 35, 27, 23, 20, 15, 25, 40, 26, 23, 20.
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Answer:
11. 70+742+85+75+768+55=1795
1795/6= 299.17
12.(i) Range: 82-50 = 32
(ii) A measure of central tendency is a single value that attempts to describe a set of data by identifying the centralposition within that set of data.The most common measures of central tendency are the arithmetic mean, the median, and the mode.
13. Median : 10+1/2 = 11/2 = 5.5
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