What is the confidence level (written as a percentage) for the interval ? (round your answer to 2 decimal places.)?

Mathematics

2 answers:

valentinak56 [21]3 years ago

7 0

You don't provide any info other than the question.

Whitepunk [10]3 years ago

6 0

I think the question is incorrect !

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A is not part of the problem, and it's what makes the condition false. B is the opposite of the statement being proved. C is the condition, not the hypothesis. However, D is the statement we are trying to prove, or the hypothesis.

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3 years ago

The rules of a contest say that there is a 5% chance of winning a prize. 400 people enter the contest. Predict how many people w

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Answer:

20 people

Step-by-step explanation:

In this problem, you are solving for 5% of 400. All percentages are out of 100, meaning 5% equals 0.05 because 5 ÷ 100 = 0.05

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8 0

3 years ago

Read 2 more answers

There are 169 million registered voters in the us. determine an interval for the number (how many) of registered democrats in th

VashaNatasha [74]

Part A:

Given that in a sample of 400 registered voters, 204 were democrats, i.e. n = 400, $\hat{p}= \frac{204}{400} =0.51$

The 95% confidence interval for the proportion of registered democrats voters in the population is given by:

$95\%\ C.I.=\hat{p}\pm z_{\alpha/2}\sqrt{\frac{\hat{p}(1-\hat{p})}{n}} \\ \\ =0.51\pm1.96\sqrt{\frac{0.51(1-0.51)}{400}}=0.51\pm1.96\sqrt{\frac{0.2499}{400}} \\ \\ =0.51\pm1.96(0.025)=0.51\pm0.049=(0.51-0.049,\ 0.51+0.049) \\ \\ =\bold{(0.461,\ 0.559)}$

Part B:

Given that there are 169 million registered voters in the US, the interval for the number of registered democrats in the population is given by

[0.461(169,000,000), 0.559(169,000,000)] = (77,909,000, 94,471,000)

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Answer:

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2 years ago

Write the following as a mixed number. ( use the / symbol in your answer). 3.7777777...

Arlecino [84]

Answer: 3/7

Step-by-step explanation: