Marissa is researching information about martial arts students she finds that 7 out of 12 of martial arts students 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, Marissa can use a proportion. She knows that 7 out of 12 martial arts students practice every day, so she can set up the proportion:
7/12 = x/144
To solve for x (the number of students who practice every day), she can cross-multiply:
12x = 7 * 144
Then divide both sides by 12:
x = (7 * 144) / 12
x = 84
So Marissa can predict that 84 students practice every day.
B. The sample size would be the number of martial arts students that Marissa used to gather her data. It is not specified in the information given, so we cannot determine the sample size.