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alukav5142 [94]
3 years ago
5

school a has 480 students and 16 in classroom School B has 192 students and 12 classroom what is the ratio of students in classr

ooms at school a and school b
Mathematics
1 answer:
galben [10]3 years ago
8 0
School a - 480:16

School b - 192:12
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Answer:

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

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This means that n = 100, \pi = \frac{42}{100} = 0.42

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So \alpha = 0.01, z is the value of Z that has a p-value of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.  

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The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 + 2.575\sqrt{\frac{0.42*0.58}{100}} = 0.547

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

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