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disa [49]
3 years ago
5

Help with worksheet commoncore.a.1

Mathematics
1 answer:
Vladimir [108]3 years ago
5 0
I don’t see it plz throw a photo of it
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he American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 45 w
Sonja [21]

Answer:

The 85% confidence interval is (0.2187, 0.2613).

Step-by-step explanation:

We have a large sample of size n = 830 Americans over 45. We have observed that 631 people don't smoke. Let p be the population proportion of Americans over 45 who smoke. An point estimate of p is \hat{p} = 199/830 = 0.24 and an estimate of the standard deviation of \hat{p} is \sqrt{\hat{p}(1-\hat{p})/n} = \sqrt{(0.24)(0.76)/830} = 0.0148. Therefore, because we have a large sample, the 85% confidence interval for the population proportion is given by \hat{p}\pm z_{\alpha/2}\sqrt{\hat{p}(1-\hat{p})/n} = 0.24\pm z_{0.15/2}0.0148 = 0.24\pm z_{0.075}0.0148 where z_{0.075} is the 7.5th quantile of the standard normal distribution, i.e., -1.4395. Therefore the 85% confidence interval is 0.24\pm (1.4395)(0.0148) or equivalently (0.2187, 0.2613).

7 0
3 years ago
A person has 2 hamburgers and 5 sodas which is 1555 calories. Another person has 3 hamburgers and 2 sodas which is 1216 calories
DedPeter [7]
What are your options is it like a A, B, C type of deal

By guess would be

1385

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7 0
3 years ago
Find the area of the shaded region
tensa zangetsu [6.8K]
The answer is 5 because of the shaded stuff


5 0
3 years ago
If 3^x/4+2=56.8, what is the value of x?<br><br> x≈6.708<br> x≈−4.323<br> x≈−2.891<br> x≈−2.059
kvv77 [185]

Answer:

The correct answer is:

None of the above

Step-by-step explanation:

I didn't find any of these answer choices to be the solution for x.

I'm sorry that I couldn't find the answer.

Have a great rest of your day/night tho!

8 0
3 years ago
Which expression is equivalent to StartFraction RootIndex 4 StartRoot 6 EndRoot Over RootIndex 3 StartRoot 2 EndRoot?
Vika [28.1K]
4 start root hope it helps
3 0
3 years ago
Read 2 more answers
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