Answer:
Point estimate: 0.391
Margin of error: 0.042
Step-by-step explanation:
A confidence interval has two bounds, a lower bound and an upper bound.
A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.
The margin of error is the absolute difference between these bounds and the point estimate.
In this question:
Lower bound: 0.349
Upper bound: 0.433
Point estimate: (0.349 + 0.433)/2 = 0.391
Margin of error: |0.349 - 0.391| = |0.433 - 0.391| = 0.042
