Mathematics
Senior High
標準偏差がわかりません。教えてください！答えは9.25点です。ちなみに平均値は66点です。
図
2組を合わせた50人全体での平均
入して小数第2位まで求め
Answers
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標準偏差がわかりません。教えてください！答えは9.25点です。ちなみに平均値は66点です。
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![(2)[1]の式はなぜこうなるのでしょうか？
解説お願いします🙏🏻 - 1](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1810073/thumb_l_webp_1717B3E3-8A84-49A5-82D1-466207496D96.webp?Expires=1787467966&Signature=YYFKv8R9OeVqsOIm0WDZEqUpatxCPL-rsczedrTYCmc7SRMdjTC~1PitUoShJI3eEEVP~WgyDI3HYGw~qEHC5Yj7kEYoG~vrymxXbEZ-Tbm7FUFXvbOpAuFTOzKBc~MmHyo9Ftd7x-1-srLwBQpLvV2sQo9LBgbLqILH4f0ODUx0Yr79Gteh~~0aJkNhbPQ-TwovHeDVju5yf9hzNgkK2jNJt~2OOL~RgWkXw2S0lD3mkloirpDzVWCFuslVE91TsezoLy68OO2qzt50HJWVavrpJRJamOV7MjEzPDV5jsLu86iDRw4QTwnD7EJTcyPaY-mUyBiknDYYGd5SR7Ni-g__&Key-Pair-Id=K2W722D70GJS8W&Expires=1787467966&Signature=kzKr2ojnkxgYoabgLwWz9TEpBCQA4t9cpUpIdCq7oQRiCVLjerEvpcFHLr9nvuiSmFZ-eVFTeCN-dxHtDKSNP2CMX6eRaPV2uNSi8SEfOwZqdtHGqTZPoJVk2PzFHVtiT4Yk-3c8q1kr2HWCA5P-u-plD3B34GNMHS-jfVlCRzxM7lbbRxjLssBVh6~r3J4CULuuffzbCu5MfGwYaeguZzykwkuKPEETY1i84DHXVIfncfVqNCWwPB~uFvf8dKmWtywO0zpVZXD0rDXNlnVkoaOiZXxOf2sHcIAooLJXDFZ0jw9MpYvVDuKNPDHR6sRHiMUFvv~PQhwxUL5ubnH61g__&Key-Pair-Id=K2W722D70GJS8W)
