Mohan measured and calculated the average weight of 100 frogs. This process involved data collection from a subset, as the entire frog population was not sampled.
In statistical terms, a statistic is a value derived from sample data. The mean weight calculated from Mohan's sample of 100 frogs qualifies as a statistic. A parameter, conversely, is a measure that describes an entire population.
Accordingly, from the provided options:
parameter
central limit
statistic
null hypothesis
The accurate selection is "statistic", aligning with the calculation performed on the frog sample.