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iragen [17]
2 years ago
14

Please i need help i don't understand this

Mathematics
1 answer:
DaniilM [7]2 years ago
7 0

Answer:

the answeeer is in the book .abpve

and c is the answer

Step-by-step explanation:

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An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected ad
VMariaS [17]

Answer:

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

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:

323 blacks, 86% of blacks said that they would welcome a white person into their families. This means that n = 323, p = 0.86

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.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 - 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8222

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 + 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8978

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

5 0
3 years ago
Solve for R. 3 + 3r > 9
Nostrana [21]

Answer:

r > 2

Step-by-step explanation:

9-3 = 6

6/3 = 2

Have a good day :)

7 0
3 years ago
This is the last question plz help
kolezko [41]

Answer:

Skewed right as the values decrease to the right.

4 0
2 years ago
3(m+7)=6(m+2) what is m equal to?
pantera1 [17]

Answer:

see attached picture please

5 0
3 years ago
Read 2 more answers
If g(x) =3/2 x +4, what is the value of g(2)?
Otrada [13]

Answer:

7

Step-by-step explanation:

g(x) = 3/2 x + 4

g(2) = 3/2 * 2 + 4

g(2) = 3 +4

g(2) = 7

8 0
2 years ago
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