UPSKILL MATH PLUS
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Learn more\(100\) surnames were randomly picked up from a local telephone directory and the frequency distribution of the number of letters in the English alphabets in the surnames was obtained as follows:
| Number of letters | \(1-4\) | \(4-7\) | \(7-10\) | \(10-13\) | \(13-16\) | \(16-19\) |
| Number of surnames | \(6\) | \(30\) | \(40\) | \(16\) | \(4\) | \(4\) |
Determine the median number of letters in the surnames. Find the mean number of letters in the surnames? Also, find the modal size of the surnames.
Answer:
Mean \(=\)
Median \(=\)
Mode \(=\)
[Note: Enter the answer upto \(2\) decimals.]
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