Question

the candy bars produced by a manufacturing plant were randomly measured. the mean weight of the bars was 8.8 oz. the margin of error was 0.3 oz. at the 90% confidence level. this means we can be 90% confident that a random candy bar from this plant would be somewhere between oz. and oz. (make sure to put smaller number first and larger number second.)

Explanation:

Step1: Calculate lower bound

Subtract margin of error from mean: $8.8 - 0.3 = 8.5$

Step2: Calculate upper bound

Add margin of error to mean: $8.8 + 0.3 = 9.1$

Answer:

8.5 oz and 9.1 oz