You are the owner of a camping site that has a small pond with fishes,and you want to know approximately the number of fishes currently in the pond.For this purpose,you catch 30 fishes and mark them with a special ink that will take a few days to be washed away.The ink doesn't affect the fishes in any way.The fishes are returned promptly to the pond after being marked.The next day at the same time of day you return and catch 30 fishes,and you find out that 5 of these fishes are marked.
A) This is an example of descriptive statistics, because you are describing the number of fishes in the pond.
B) This is not an example of statistics.
C) This is an example of inferential statistics, because you are inferring the population of fishes.
D) This could be either an example of descriptive or inferential statistics, depending on your procedure after you find out that 5 fishes are marked among the selected 30 on the second day.
E) This procedure would not allow you to estimate the population of fishes.

Question

Quizplus · Accepted Answer

This is an example of inferential statistics because the fish that were caught and marked on the first day represent a sample from the population of fishes in the pond, and the proportion of marked fish in the second sample can be used to estimate the total number of fish in the pond using statistical inference.

You Are the Owner of a Camping Site That Has