The answer is B.
A radius means a line which goes from center to a point on the circle. So every line that includes point A and ends on the circle is a radius.
Answer:
y = 5
Step-by-step explanation:
4 (y - 6) = -4
×4 ×4 Distribute 4 with y and 6
4y - 24 = -4
+24 +24 Add 24 to both sides of the equation
4y = 20
÷4 ÷4 Divide each side by 4
y = 5
Answer:
x = 9b/C
Step-by-step explanation:
Cx – 4b = 5b
Add 4b to each side
Cx – 4b+4b = 5b+4b
Cx = 9b
Divide by C
Cx/C = 9b/C
x = 9b/C
Answer:
Confidence interval for the population proportion of women fearing from breast cancer are 61%
Step-by-step explanation:
Point estimate of the proportion of the population of women who feared from breast cancer is:
β=61%
Standard error of the estimate:
Se= 0.154
Margin of error for 90% confidence interval for the population proportion:
0.254
90% confidence interval for the population proportion will be
(0.5846,0.6354)
Answer:
a. the standard deviation for young mothers is not expected to be different than the standard deviation in the population
Step-by-step explanation:
The population mean = μ= 7.5
Sample mean = x`= 7.3
Sample standard deviation= s= 0.6
Sample size = 87
Assuming normality we perform z test
z= x`-u/s/√n
z= 7.3-7.5/0.6/√87
z= -3.11
The critical region for 0.05 for two tailed test is z>+1.96 and Z<-1.96
Since the calculated z= -3.11 falls in the critical region Z<-1.96 we conclude that birth rate is lower in the young mothers.
a. the standard deviation for young mothers is not expected to be different than the standard deviation in the population
Only choice a is correct because when n > 30 the population standard deviation and the sample standard deviation are assumed to be normal
Choice b cannot be the correct option because it is already inferred that only one baby was measured per mother.
Choice C cannot be also the best choice because it is already assumed.
Choice d is totally incorrect.
