Answer:
(0.4543 ; 0.5057)
Step-by-step explanation:
This is a confidence interval for one sample proportion :
Phat , = 0.48
Sample size = 1450
1 - phat = 1 - 0.48 = 0.52
Zcritical = 95% ; Zcritical at 95% = 1.96
Using the relation :
Phat ± Zcritical *√[phat(1-phat) / n]
√[phat(1-phat) / n] = √(0.48*0.52) /1450) = 0.0131201
Lower boundary :
0.48 - (1.96 * 0.0131201) = 0.4543
Upper boundary :
0.48 + (1.96 * 0.0131201) = 0.5057
(0.4543 ; 0.5057)
X^6 - 8, because it is (x^2)^3 - 2^3
Your answer would be 70
10 divided by 3=3.33
3.33 times 21= 70
I think c!!!!!!!!!!!!!!!!!!!!
So what I would do is first multiply the mean by 4 and that is the total u need, 146.5, to have a mean of 36 and 5/8. Next I add the lengths given, which is 110.625, and then I would subtract it from 146.5 which is 35.875 which is 35 and 7/8. You can also check the answer by finding the mean of the 4 numbers and determining if it comes out to 36 and 5/8. The answer is C. Hope this helps!