The life time in days of 100 electricity tubes.

The following table gives the lifetime in days of 100 electricity tubes of a certain make :

Find the mean lifetime of electricity tubes.

Solution:

Using the information given in the adjoining histogram, calculate the mean correct to one decimal place.

Solution:

From the histogram given, we represent the information in the following table :

More Solutions:

• Calculate the mean and the median.
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• For the following frequency distribution.