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irakobra [83]
3 years ago
7

| If f(x) = (3x – 1, find f(2) and f(-2)

Mathematics
1 answer:
Brums [2.3K]3 years ago
6 0

Answer:

f(2)=5, f(-2)=-7

Step-by-step explanation:

Step 1 : f(2)=3(x)-1

            f(2)=5

Step 2 : f(-2)=3(x)-1

              f(-2)=-7

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Answer:

We need a sample size of 564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

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The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

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So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

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n is found when M = 0.04

So

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0.04\sqrt{n} = 1.96\sqrt{0.6231*0.3769}

\sqrt{n} = \frac{1.96\sqrt{0.6231*0.3769}}{0.04}

(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.6231*0.3769}}{0.04})^{2}

n = 563.8

Rounding up

We need a sample size of 564.

4 0
3 years ago
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bezimeni [28]
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Step-by-step explanation:

I am BIG brain

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