Marks obtained by 50 students in statistics are given below55 25 56 39 46 46

Marks obtained by 50 students in statistics are given below55 25 56 39 46 46 36 35 68 75 42 55 59 36 38 56 48 68 92 42 36
Need to have calculation process
Marks obtained by 50 students in statistics are given below
55 25 56 39 46 46 36 35 68 75
42 55 59 36 38 56 48 68 92 42
36 64 39 64 42 45 56 48 78 63
45 54 47 50 54 58 61 57 68 81
66 45 49 39 25 32 35 42 40 58
Construct discrete frequency distribution table
Construct grouped frequency distribution table. Take class intervals as 21-30 31-40 41-50 etc
Comment on the results obtained. What are the advantages of grouping of the data.
Draw histogram frequency polygon and ogives on the grouped data. Find median and mode graphically.
Present the following information in a suitable tabular form
In 1995 out of total 2000 workers in a factory 1550 were members of a trade union. The number of women worker employed was 250 out of which 200 did not belong to any trade union. In 2000 the number of union workers was 1725 of which 1600 were men. The number of non-union workers was 380 among which 155 were women.
List down various measure of central tendency and explain the difference between them.
Find mean and median for the following data: 41 42 43 42 43 42 44 44 40 45.
The mean marks of 100 students were found to be 40. Later on it was discovered that the score of 53 was misread as 83. Find correct mean corresponding to correct data.The monthly income (in $) of 7 families in village are as follows:
1200 1000 1100 1250 950 1100 1350.
Calculate median and mode.
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