Question

Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on one day a week for a given year on one day a week for a given year​, and the average​ (mean) value is 144.3 144.3 volts.
Choose the correct answer below.
A. The given value is a parameter parameter for the year year because the data collected represent a population population.
B. The given value is a parameter parameter for the year year because the data collected represent a sample sample.
C. The given value is a statistic statistic for the year year because the data collected represent a sample sample.
D. The given value is a statistic statistic for the year year because the data collected represent a population population.

Answer 1

Answer: Option C.

Explanation:

In this type of statistical problems you usually want to find the value of a certain parameter. In this case, the parameter is the average of the voltage of the whole year.

Many times it is difficult to record the values for the entire population (record the voltage every day), and that is why you usually take a sample of the population (some of the days) and find the average voltage based on it to estimate the parameter.

This value that estimates the parameter is called statistic, therefore the correct option is C.