MEASURES OF CENTRAL TENDENCY:
1) What do you mean by the term "Statistics"? Also state the importance of statistics.
2) What is the difference between mean, median and mode?
3) What are the different implications of mean, median and mode?
4) What do you mean by Dispersion?
5) Define raw moments? What do raw moment about 3 indicates.
6) Calculate Karl Pearson's co-efficient of skewness.
Midpoint : 15 20 25 30 35 40
Frequency : 12 18 25 24 20 21
7) Calculate Mean, Median and Mode of the data given below:
|
Marks:
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10
|
20
|
30
|
40
|
50
|
60
|
|
No of students:
|
8
|
23
|
45
|
65
|
75
|
80
|
8) If the average monthly income of the workers in the factory is Rs.520/- and the average monthly income of male workers and female workers are Rs. 540/- and Rs. 460/- respectively, find the percentage of male workers and female workers in the factory.
9) The mean marks of 100 found to be 40. Later it was found to be that a mark 53 was misread as 83. (i) Find the correct mean mark. (ii) Find the mean mark if the wrong mark was omitted.