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Find create a gropued frequency distribution table {77,40,85,82,98,93,66,78,94,50,57}

Solution:
Your problem -> create a gropued frequency distribution table {77,40,85,82,98,93,66,78,94,50,57}

77,40,85,82,98,93,66,78,94,50,57

Here minimum value is 40 and maximum value is 98
 Class Class Boundaries Tally marks 41 - 50 51 - 60 61 - 70 71 - 80 81 - 90 91 - 100

Class boundaries : subtracting 0.5 from lower class limit and adding 0.5 to upper class limit
 Class Class Boundaries Tally marks 41 - 50 40.5 - 50.5 51 - 60 50.5 - 60.5 61 - 70 60.5 - 70.5 71 - 80 70.5 - 80.5 81 - 90 80.5 - 90.5 91 - 100 90.5 - 100.5

For each value draw a mark, next to the class in which this value exists.
77,40,85,82,98,93,66,78,94,50,57

 Class Class Boundaries Tally marks 41 - 50 40.5 - 50.5 || 51 - 60 50.5 - 60.5 | 61 - 70 60.5 - 70.5 | 71 - 80 70.5 - 80.5 || 81 - 90 80.5 - 90.5 || 91 - 100 90.5 - 100.5 |||

Count marks to determine the total frequency of each class.
 Class Class Boundaries Frequency 41 - 50 40.5 - 50.5 2 51 - 60 50.5 - 60.5 1 61 - 70 60.5 - 70.5 1 71 - 80 70.5 - 80.5 2 81 - 90 80.5 - 90.5 2 91 - 100 90.5 - 100.5 3

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