To identify which scenario is an example of a statistic, let's analyze the options given.
-
Every worker at the local arcade was asked how many hours they spend listening to music in a day. The mean number of hours was 5.
- This is a statistic because it gives a summary (mean) of a sample (all workers at the local arcade).
-
Thirty students were randomly selected from Mrs. Calzada’s group of 158 students. They were asked how many hours they spend watching TV every day. The mean number of hours was 2.
- This is also a statistic because it provides a summary (mean) of a sample (the 30 students).
-
All the lions at the local zoo were monitored to see how many hours they slept in a day. The mean number was 4.
- This is not a statistic; it is a parameter because it summarizes the entire population of lions at the zoo.
-
The temperature of every person who walked into a local clinic was recorded. The mean temperature was 98.7° F.
- This is also a parameter because it summarizes the entire population of people who walked into that clinic.
Thus, the scenarios that represent a statistic are the first two options:
- Mean of 5 hours spent listening to music at the arcade (first option)
- Mean of 2 hours watching TV from the selected students (second option)
Since the question asks for a single example of a statistic, the best answer is:
Thirty students were randomly selected from Mrs. Calzada’s group of 158 students. They were asked how many hours they spend watching TV every day. The mean number of hours was 2.