お題:

  • コンクリート強度試験をA社とB社に依頼した結果、供試体25本(計50本)の圧縮強度(ニュートン毎平方ミリメートル)はそれぞれ次のとおりであった。
  • A:28.06,28.26,32.69,21.54,31.96,28.31,31.56,27.5,29.23,28.6,38.78,25.87,34.85,35.51,31.18,29.14,22.45,27.57,24.4,35.36,33.16,27.83,40.99,27.95,30.84
  • B:27.41,38.12,22.66,26.64,27.99,21.27,29.77,32.2,36.42,22.58,34.12,20.83,31.29,18.71,31.06,34.81,18.35,28.48,26.29,29.65,35.84,17.13,34.01,24.12,37.04
  • 供試体の圧縮強度分布にA社とB社で違いはあるか?