Lean Six Sigma Green Belt (LSSGB) — Question 2

According to a manager it takes an average weekday commute of 39 minutes with a Standard Deviation of 7 minutes for the employees to get to work when they use their personal vehicles for their office commute while management set a policy of not more than 40 minutes for their daily one-way commute. A survey conducted one day on 70 employees showed an average of 34 minutes commuting time using the metro public transportation system with a Standard Deviation of
21 minutes. For the employees choosing to increase their chances to come on time using personal transportation their variation should be reduced to
___________?

Answer options

Correct answer: C

Explanation

The correct answer is C, as reducing the variation to 3.5 minutes aligns better with the company's commute policy and improves the likelihood of arriving on time. Options A and B suggest smaller reductions that may not sufficiently meet the policy's requirements, while D implies eliminating variation entirely, which is impractical.