Aportion of the population selected to represent the population is called a. descriptive statistics b. a census c. a sample d. statistical inference

The right option is; c. A sample

A portion of the population selected to represent the population is called a sample.

A sample is the smaller part of a larger group selected to represent the whole group. A sample is expected to represent the whole population and not to show any prejudice or differences toward a certain characteristic. In experimental studies, samples are used when the size of a population is too large and in order to ensure that all members of a population are equally observed and selected.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.