Inequalities on the Number Line

Mathematics

1 answer:

kumpel [21]2 years ago

3 0

The number line is a closed circle because the circle at the ends are not shaded in. A closed circle to the right means greater than. (>) A closed circle to the left means less than. (<)

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8. Given the standard deviation of 16 for a population and a 95% confidence level, find the margin

Kazeer [188]

Answer:

4.0486

Step-by-step explanation:

The margin of error is calculated using $E=z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} }$

Where n=60 is the sample size and $\sigma=16$ is the population standard deviation.

The critical value corresponding to 95% confidence interval is $z_{\frac{\alpha}{2}}=1.96$

We substitute the values to obtain;

$E=1.96*\frac{16}{\sqrt{60} }$

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Step-by-step explanation:

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