
Using the assumed mean method, find the mean of the following frequency distribution.
Class
Frequency


Important Questions on Statistics
Find the mean of the following distribution by step-deviation method.
class interval | ||||||
frequency |

Find the mean of the following data by using step-deviation method.
class | |||||
frequency |

The monthly pocket money of students of a class is given in the following frequency distribution
Pocket money | |||||
Number of students |
Find the mean of pocket money using step deviation method.

Calculate the mean of the scores of students in a Mathematics test.
Marks | |||||
Number of students |

If the mean of the distribution is and the sum of all frequencies is , then find the missing frequencies and .
class | ||||||||
frequency |


Prepare the frequency distribution table for the given data.
Marks | below | below | below | below | below | below |
Number of students |

Given, below is a cumulative frequency distribution of 'more than type'.
Marks | Number of students |
More than or equal to | |
More than or equal to | |
More than or equal to | |
More than or equal to | |
More than or equal to | |
More than or equal to |
Change the above data into a continuous grouped frequency distribution.
