3 years ago

A youth group has 6 fifth-grade students, 7 sixth-grade students,

Mathematics

1 answer:

Juliette [100K]3 years ago

4 0

Since there are 15 people in all, and there are 7 sixth graders, the chances would be 46.6%.

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3 years ago

Simplity 2(- 4)+7(x + 2).

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Step-by-step explanation:

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Scott: 200/10 ft^2/hr

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3 years ago

An environmental science teacher at a high school with a large population of students wanted to estimate the proportion of stude

AnnZ [28]

Answer:

60 students

Step-by-step explanation:

The confidence interval of a proportion is given by:

$p\pm z*\sqrt{\frac{p*(1-p)}{n} }$

Where 'p' is the proportion of students who responded 'yes', 'z' is the z-score for a 95% confidence interval (which is known to be 1.960), and 'n' is the number of students in the sample.

If the confidence interval is from 0.584 to 0.816, then:

$p=\frac{0.584+0.816}{2}=0.7 \\0.816-0.584=2*(1.96*\sqrt{\frac{p*(1-p)}{n}}) \\0.116=1.96*\sqrt{\frac{0.7*(1-0.7)}{n}}\\n=16.8966^2*(0.7*0.3)\\n=60\ students$

60 students were in the sample.

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3 years ago