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Archy [21]
3 years ago
9

In a sample of 50 randomly selected students at a school, 38 students eat breakfast every morning. There are 652 students in the

school. using these results, predict the number of students that eat breakfast.
A. 76
B.123
C.247
D.496
Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
5 0
For the sample:
\frac{38}{50} = 0.76 = 76\%

Applying this to the whole population:

652 \times \frac {38}{50} = 495.52

Since we can't have "0.52 of a person" we roudn to the neares whole, or 496.
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Answer:

0.0594.

Step-by-step explanation:

The standard error of a proportion p, in a sample of size n, is given by:

SE_{p} = \sqrt{\frac{p(1-p)}{n}}

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SE_{p} = \sqrt{\frac{0.6774*0.3226}{62}} = 0.0594

So the correct answer is:

0.0594.

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Complete question is;

Suppose that a dimension x and the area A = 2x² of a shape are differentiable functions of t. Write an equation that relates dA/dt to dx/dt.

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Step-by-step explanation:

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