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Vadim26 [7]
3 years ago
7

What is 3,4,5 plz and thank you

Mathematics
1 answer:
Tcecarenko [31]3 years ago
8 0
For 3 it’s b. For 2 it’s 8. For 4 it’s the whole number
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Out of 100 people sampled, 42 had kids. Based on this, construct a 99% confidence interval for the true population proportion of
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Answer:

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

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 z-score that has a p-value of 1 - \frac{\alpha}{2}.

Out of 100 people sampled, 42 had kids.

This means that n = 100, \pi = \frac{42}{100} = 0.42

99% confidence level

So \alpha = 0.01, z is the value of Z that has a p-value of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.  

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 - 2.575\sqrt{\frac{0.42*0.58}{100}} = 0.293

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 + 2.575\sqrt{\frac{0.42*0.58}{100}} = 0.547

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

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2 years ago
The base of a rectangular tank is 3 feet by 2 feet, and the tank is three feet tall. The water in the tank is just 9 inches deep
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Solve the smetaneous equatan graphically x-2y=1 2x-y=2 given the range of x from-3 to 3 choose a suitable scale​
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Answer:

  • (2, 0)

Step-by-step explanation:

<u>Given system:</u>

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Graphing easy if you plot the x- and y- intercepts and connect them with a line.

<em>See attached.</em>

Both lines have same x-intercept, which is also the solution: (2, 0)

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In the past, 26% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An independent research firm ha
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Answer:

(Round your answer up to the nearest whole number.)(b) Repeat part (a) using a 99% confidence level. (Round your answer up to the nearest whole number.)

Step-by-step explanation:

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What's the formula of<br><br><br>(a+b)³ = ?<br><br>​
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(a+b)³=a³+3a²b+3ab²+b³

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