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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
9 Nov 2021

Given information

engineering conferences were announced. Four conferences lasted two days. Thirty-six lasted three days. Eighteen lasted four days. Nineteen lasted five days. Four lasted six days. One lasted seven days. One lasted eight days. One lasted nine days.

And  the length (in days) of an engineering conference.

Step-by-step explanation

Step 1.

Mean is a measure of central tendency. Mean is also termed as average. It is the ratio of sum of all the values to the total number of values.

The formula to calculate mean is:

   

where, , is the frequency. 

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