Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Marissa is researching information about martial arts students. She found that 7 out of 12 martial artists practice every day. There are 144 martial arts students at a school.
a. Predict how many students practice every day.
b. What is the sample size?
a. To predict how many students practice every day, we can use proportions:
7/12 = x/144
Cross-multiplying, we get:
12x = 7 * 144
Simplifying:
12x = 1008
x = 84
Therefore, we predict that 84 students practice martial arts every day.
b. The sample size is 144, as given in the problem.