Answer
16% of eruptions last less than 98 seconds.
Work Step by Step
Using the Empirical rule, we have:
x̅ - 1s = 104 - 6.249 ≈ 98
x̅ + 1s = 104 + 6.249 ≈ 110
Hence, 68% of eruptions last between 98 and 110 seconds, according to the Empirical Rule. Therefore, $100 - 68 = 32\%$ of eruptions last less than 98 and more than 110 seconds. Hence, $32\div 2 = 16\%$ of eruptions last less than 98 seconds.
