If xi’s are the mid - points of the class intervals of grouped data, fi are the corresponding frequencies and is the mean, then is equal to
B. - 1
We know that the mean
- - - (2)
From (1) and (2) we get
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An incomplete distribution is given below:
You are given that the median value is 46 and the total number of items is 230.
(i) Using the median formula fill up missing frequencies.
(ii) Calculate the AM of the completed distribution.RD Sharma - Mathematics
The following distribution shows the daily pocket allowance given to the children of a multistory building. The average pocket allowance is Rs. 18.00. Find out the missing frequency.
In a retail market, fruit vendor were-selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes.
Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?RD Sharma - Mathematics
The mean of the following frequency distribution is 62.8 and the sum of all the frequencies is 50. Compute the missing frequency is 50. Compute the missing frequency.
The table below shows the daily expenditure on food of 25 households in a locality.
Find the mean daily expenditure on food by a suitable method.
If the mean of the following distribution is 27, find the value of p.