Facts That Matter- Statistics Class 10 Notes | EduRev

Class 10 Mathematics by VP Classes

Class 10 : Facts That Matter- Statistics Class 10 Notes | EduRev

The document Facts That Matter- Statistics Class 10 Notes | EduRev is a part of the Class 10 Course Class 10 Mathematics by VP Classes.
All you need of Class 10 at this link: Class 10

Facts that Matter:                                                                       Facts That Matter- Statistics Class 10 Notes | EduRevLet us remember that Mean, Median and Mode are measures of central tendency i.e., numerical representatives of the given data. Let us also note the following points.

Facts That Matter- Statistics Class 10 Notes | EduRev
2. Mean of grouped data:  
(i) Using direct method:Facts That Matter- Statistics Class 10 Notes | EduRev
(ii) Using the assumed mean method:  Facts That Matter- Statistics Class 10 Notes | EduRev
(iii) Using the step deviation method:  Facts That Matter- Statistics Class 10 Notes | EduRev

3. The mode for grouped data is found by using the formula:

Facts That Matter- Statistics Class 10 Notes | EduRev

where, l = lower limit of the modal class.
h = size of the class interval.
f1 = frequency of the modal class.
f0 = frequency of the class preceding the modal class.
f2 = frequency of the class succeeding the modal class.

Facts That Matter- Statistics Class 10 Notes | EduRev

4. Cumulative frequency of a class is the frequency obtained by adding the frequencies of all the classes preceding the given class.

5. Median of the given grouped data is obtained using the formula:

Facts That Matter- Statistics Class 10 Notes | EduRev

where, l = lower limit of median class.
n = number of observations.
cf = cumulative frequency of class preceding the median class
f = frequency of median class
h = class size

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