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
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
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 
95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:

The upper limit of this interval is:

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).
Answer:
________________________________________
1) " 30, 60, 50 " .
2) " 30, 50, 6 " .
3) " 60, 50, 3 " .
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<u>Note</u>:
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1) 30 * 60 * 5 = 9,000 .
2) 30 * 50 * 6 = 9,000 .
3) 60 * 50 * 3 = 9,000 .
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Hello: here is a solution
Answer:
y=1/2x+3
Step-by-step explanation:
-4x+8y=24
Slope-intercept form: y=mx+b
Add -4x on each side
-4x+8y=24
+4x +4x
8y=4x+24
Divide by 8 on each side
<u>8y</u>=<u>4x+24</u>
8 8
y=4/8x + 3
Simplify 4/8x
y=1/2x+3