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ioda
3 years ago
7

A doctor asks a nurse to give a

Mathematics
2 answers:
AlekseyPX3 years ago
3 0

Answer:

Hey there!

For this question, we write a proportion.

\frac{40}{0.6}=\frac{250}{x}

40x=150

x=3.75

Thus, the nurse to give the patient exactly 3.75 ml of the solution.

Let me know if this helps :)

vova2212 [387]3 years ago
3 0

Answer:

3.75 ml of the solution.

Step-by-step explanation:

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Solve for x 3x +2= y; y=5. X=____
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Read 2 more answers
The NWBC found that 42.1% of women-owned businesses provided retirement plans contributions.
Natasha_Volkova [10]

Answer:

Sample size of 586 or higher.

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}.

The margin of error is:

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

95% confidence level

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.

What sample size could be 95% confident that the estimated (sample) proportion is within 4 percentage points of the true population proportion?

Sample size of at least n when M = 0.04

42.1% of women-owned businesses provided retirement plans contributions, which means that p = 0.421. So

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

0.04 = 1.96\sqrt{\frac{0.421*0.579}{n}}

0.04\sqrt{n} = 0.9677

\sqrt{n} = \frac{0.9677}{0.04}

\sqrt{n} = 24.19

\sqrt{n}^{2} = (24.19)^(2)

n = 585.2

We need a sample size of 586 or higher.

3 0
3 years ago
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