25. The heights of three-year-old boys are Normally distributed with a mean of
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The mean of a distribution is the sum of the data elements divided by the count of the dataset.
<em>The mean of the distribution is 4</em>
The complete table is given as
The complete question requires that, we calculate the mean of the dataset
First, we calculate the class midpoint
This is the average of the class interval
<u />
<u>For interval 0 - 2, </u>
<u>For interval 3 - 5,</u>
<u>For interval 6 - 8</u>
So, the table becomes
The mean is then calculated as:
This gives
Hence, the mean of the distribution is 4
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