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If the mean of observations and is , find the value of .
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Text solutionVerified
We know that,
Mean
Sum of the given observations
Total number of observations
Therefore, Mean
Also, Mean
(given)
or
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Suppose a population A has 100 observations 101, 102, .., 200 and another population B has 100 observations 151, 152,..,250. If represent the variances of the two populations, respectively, then is equal toQuestion 2
The heights of 50 students, measured to the nearest centimetres, have been found to be as follows:(i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as etc.
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Question Text | If the mean of observations and is , find the value of . |
Answer Type | Text solution:1 |
Upvotes | 153 |