數學與統計 大學 約5年以前

不懂我算起來怎麼是這樣 是公式沒搞懂嗎…？😣

4 析幼

數學與統計 大學 5年以上以前

請問式子有錯嗎

19. The Sea Mist Hotel collects customer satisfaction data daily. Yesterday, the hotel was 999%6 occupied and the manager wanted to quickly assess customer satlsfaction She 9 selected 10 scores, The maximum score is 100 points. Ihe mean score 1s 82.1. The TO scores were: 2 | 655 bo 夫、S9. MS、13. 八,人.、 tee 及 v 畫 凋 [86 96 |68| 93|99| 100| 801 55160|84 What is the variance? 262.544 (的-207+ tto-6230)((68-8201tU9- (tt 32.0 lu