the average age of men who had walked on the moon was 39 years, 11months, 15days. Is the value aparameter or a statistic?

Parameter

Step-by-step explanation:

We are given the following in the question:

The average age of men who had walked on the moon was 39 years, 11 months, 15 days.

Population and sample:

Population is the collection of all observation for variable of interest or individual of interest. Sample is a subset for population.

Parameter and statistic:

Any variable or value describing a population is known as parameter. Any value describing a sample is known as statistic.

Population of interest:

men who had walked on the moon

Value:

average age of men who had walked on the moon

Thus, the give value describes a population and hence, it is a parameter.