Answer:
(8 (-1))
Step-by-step explanation:
Simplify the following:
8 (7 + 4×2 - 4 (11 - 7))
11 - 7 = 4:
8 (7 + 4×2 - 44)
4×2 = 8:
8 (7 + 8 - 4×4)
-4×4 = -16:
8 (7 + 8 + -16)
7 + 8 = 15:
8 (15 - 16)
15 - 16 = -(16 - 15):
8 (-(16 - 15))
| 1 | 6
- | 1 | 5
| 0 | 1:
8 (-1)
8 (-1) = (8 (-1)):
Answer: (8 (-1))
The mean proportion is p = 36/120 = 0.3.
The standard deviation of the proportion will be sqrt(p*(1-p)/n) = sqrt(0.3*0.7/120) = 0.0418. We multiply this by the z-score of 1.645 to get a deviation of 0.0688.
Therefore, the confidence interval is (0.3 - 0.0688, 0.3 + 0.0688), which is
(0.2312, 0.3688).
