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["第一章"]
["練習問題の解答"]
[1,"group03でグラフの種類をScatterに変更します。"]
{"$rows_empty":18}
[2,"sampleコマンドを使って期間を設定し、記述統計量を求めます。"]
[null,"1994年第一四半期から2000年第4四半期"]
[]
[]
[{"$nulls":7},"平均値は46621.87"]
{"$rows_empty":11}
[null,"2001年第一四半期から2007年第2四半期"]
[]
[{"$nulls":7},"平均値は65417.17"]
{"$rows_empty":11}
[3,"exportとgconsからなるグループオブジェクトgroup04を作成します。"]
[null,"そいてグラフの種類としてMixed with linesを選択します。"]

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