A study of voting chose $663$registered voters at random shortly after an election. Of these, $72\%$said they had voted in the election. Election records show that only$56\%$ of registered voters voted in the election. Which of the following statements is true about the boldface numbers?

(a)$72\%$is a sample; $56\%$is a population.

(b) $72\%$and$56\%$ are both statistics.

(c)$72\%$is a statistic and $56\%$is a parameter.

(d) $72\%$is a parameter and $56\%$is a statistic.

(e) $72\%$and$56\%$ are both parameters.

Given in the question that, A study of voting chose $663$registered voters at random shortly after an election. Of these,$72\%$said they had voted in the election. Election records show that only $56\%$of registered voters voted in the election

Number of registered voters$=663$

Percent of voters who said they voted in the election$=72\%$

Percent of registered voters who voted in the election$=56\%$

Know that a descriptive measure for a population is a parameter and a descriptive measure for a sample is a statistic.

Here, since the proportion$72\%$is based on the study of randomly selected numbers of voters that is, $663$; so $72\%$is a statistic.

Also, the proportion $56\%$is based on all registered voters. This means the $52\%$is a parameter.

Thus, $72\%$is a statistic and $56\%$is a parameter.

Hence, the correct answer is (c).