# Lean Six Sigma

**Question description**

A | Yes, because the T-statistic of 3.125 exceeded the T-critical value of 2.365 | |

B | Yes, because the T-statistic of 4.51 exceeded the T-critical value of 2.365 | |

C | No, because the T-statistic of 0.563 failed to exceed the T-critical value of 2.365 | |

D | Yes, because the T-critical value is 1.895 |

Vehicle 1 2 3 4 5 6 7 8

MPG pre additive 15 13 17 21 14 16 18 17

MPG post additive 18 19 17 24 18 21 19 20

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