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:
7 x 13 expanded form is y = 7 x 13 ........ 7 dived by 13 in expand form is y=7 dived by 3
Step-by-step explanation:
if that's not what your looking for sorry :)
Answer:
a number
Step-by-step explanation:
A. 4/10
B. x+4/x+10
C. x+10
The ratio is the relation between numbers. 40/100 is simplified to 4/10 (40%)
Answer:
1st option
Step-by-step explanation:
7x + 7 and 112 are vertically opposite angles and are congruent , then
7x + 7 = 112 ( subtract 7 from both sides )
7x = 105 ( divide both sides by 7 )
x = 15
4y and 112 are adjacent angles and sum to 180° , that is
4y + 112 = 180 ( subtract 112 from both sides )
4y = 68 ( divide both sides by 4 )
y = 17
