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["Filename","Branch No."]
["230318 PA 1",8]
["230318 PA 2",8]
["230318 PA 3",5]
["230318 PA 4",4]
["040418 PA 2",7]
["040418 PA 4",6]
["050418 PA 1",6]
["050418 PA 3",7]
[]
["050418 PA 5",6]
["050418 PA 6",8]
["050418 PA 7",7]
[]
["290518 PA 2",5]
["290518 PA 3",3]
["290518 PA 4",8]
["290518 PA 5",7]
["290518 PA 6",8]
["290518 PA 7",5]
["290518 PA 8",8]
["290518 PA 9",4]
["290518 PA 10",7]
[]
[]
[]
["mean",{"$f":"AVERAGE(B2:B23)","v":6.35}]
["std",{"$f":"STDEV(B2:B23)","v":1.5652475842498519}]

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