Question

Colored Wheel

A survey on 200 Senior High School learners on how much time they read per

week has a confidence interval of (13.5, 17.9) in hours at 95% confidence level.

What is the margin of error? _________________________

What is the average time they read per week? __________________

Answer 1

Since the confidence interval is symmetric,

The margin of error is $\frac{17.9-13.5}{2}=2.2$

The average time is $\frac{13.5+17.9}{2}=15.7$