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3 years ago

For the following statements 11 - 16 write TRUE or FALSE.

1 answer:

4 0

Answer:11 is false. Through any two points there is exactly one line. 12 is true. 13 is true. 14 is true. 15 is false. Two planes intersect at a line. 16 is false. A line and a plane would intersect at a point

Step-by-step explanation:

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The ages of registered voters in Smith County are normally distributed with a population standard deviation of 3 years and an un

eimsori [14]

Answer:

The margin of of error for a 95% confidence interval for the population mean is of 1.39 years.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

The margin of error is:

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Population standard deviation of 3 years

This means that $\sigma = 3$

Sample of 18 voters

This means that $n = 18$

Margin of error:

$M = z\frac{\sigma}{\sqrt{n}}$

$M = 1.96\frac{3}{\sqrt{18}}$

$M = 1.39$

The margin of of error for a 95% confidence interval for the population mean is of 1.39 years.

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3 years ago

What is the value of x in the equation -2.4x = 8.4? -20.16 -3.5 3.5 20.16

ololo11 [35]

Answer:

Step-by-step explanation:

x = 8.4/-2.4 = -84/24 = -3.5

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Levart [38]

I think the answer is c but i could definitely be wrong sorry

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TEA [102]

Answer:

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3. How did the experimental probability and theoretical probability of rolling a 5 compare?

Monica [59]

Answer:12

Step-by-step explanation:

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