Answer:
d) 16%
Step-by-step explanation:
The empirical rule states that for a normal distribution population with a mean (μ) and standard deviation (σ), the following conditions occur:
- 68% falls within one standard deviation μ ± σ
- 95% falls within two standard deviation μ ± 2σ
- 99.7% falls within three standard deviation μ ± 3σ
Given μ = 16 ounce and σ = 0.05 ounce.
68% falls within one standard deviation = μ ± σ = 16 ± 0.05 = (15.95, 16.05)
the number that falls outside one standard deviation = 100% - 68% = 32%
Therefore percentage of boxes have weights that are more than 1 standard  deviation above the mean = 32% / 2 = 16%
