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Stella [2.4K]
3 years ago
8

2part question A.predict B what sample size Show work

Mathematics
1 answer:
storchak [24]3 years ago
5 0

Answer:

a. 84 students

b. 12

Step-by-step explanation:

a.

From the information given, we see that 7 out of 12 practice every day. Now we want to know how many (let it equal x) would we expect to practice everyday given there are total 144 martial artists?

<em>we set up a ratio and cross multiply and solve for x:</em>

<em>\frac{7}{12}=\frac{x}{144}\\7*144=12*x\\1008=12x\\x=\frac{1008}{12}=84</em>

<em />

<em>So 84 students practice everyday</em>

b.

The sample size is a "proportion" of the whole population. Here, there are a total of 144 martial artists. And we took 12 of them to figure out how many practice everyday (from these 12). So , clearly, the sample size is 12

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