A data (datum?) is an information such as
"tree 1 has a height of 5 meter" it is a data. Up to best of my understanding, height is a variable and 5 meter is a value. A variable and an associated value making up a data (datum?).
A statistic is any quantity computed from values in a sample that is used for a statistical purpose.
"The manager of a large hotel located near Disney World indicated that 20 selected guests had a mean length of stay equal to 5.6 days." In this example, "5.6 days" is a statistic, namely the mean length of stay for our sample of 20 hotel guests. The population is the set of all guests of this hotel, and the parameter is the mean length of stay for all guests - (Wikipedia)
It looks like same as a datum. Also the quotation mark around "5.6 days" makes me think whether the term statistic means value.
Now my question is what are the differences between data, statistic and value.
What I have already tried: I have consulted my textbok 'Introduction to Biostatistics (A textbook of biometry)' by Dr. P. K. Banerjee; Also I have visited various website on google. However the differences are not clearing up.