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3 years ago

This table shows how many students from two high schools attended a

Mathematics

1 answer:

nalin [4]3 years ago

5 0

Answer:

C. 0.60

Step-by-step explanation:

We need to find out a couple things first:

How many students are from Westville?
How many students did not attend the game that are from Westville?

We need to find specifically Westville, because we don't want to accidentally pick someone from North Beach who attended.

So let's look:

Total from Westville: 150
Total who did not attend from Westville: 90

Now in order to find a probability, we need to divide the smaller number from the biggest number. Let's do that:

90/150 = 0.6

And for this question, we specifically have to round to two decimal places. In order to do this, we just write the extra 0 at the end:

0.6 = 0.60

Look at that, 0.60 is one of our answers! :D

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The FDA regulates that fresh Albacore tuna fish that is consumed is allowed to contain 0.82 ppm of mercury or less. A laboratory

puteri [66]

Answer:

$n=(\frac{2.17(0.143)}{0.023})^2 =182.03 \approx 183$

So the answer for this case would be n=183 rounded up to the nearest integer

Step-by-step explanation:

Information provided

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma = 0.143$ represent the population standard deviation

n represent the sample size

$ME = 0.023$ the margin of error desired

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =0.023 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The confidence level is 97% or 0.97 and the significance would be $\alpha=1-0.97=0.03$ and $\alpha/2 = 0.015$ then the critical value would be: $z_{\alpha/2}=2.17$ , replacing into formula (5) we got:

$n=(\frac{2.17(0.143)}{0.023})^2 =182.03 \approx 183$

So the answer for this case would be n=183 rounded up to the nearest integer

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3 years ago

Given: S,T, and U are Collinear and ST = TÚ

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It's true
collinear means they are on the same line so ST=SU
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