22 subjects are randomly injected with different dosages of insulin (X) and reduction rate in their blood-sugar levels (Y) are recorded. The results…

22 subjects are randomly injected with different dosages of insulin (X) and reduction rate in their blood-sugar levels (Y) are recorded. The results are summarized as:

ΣX = 132; ΣX2 = 917; ΣY = 44; ΣY2 = 348; ΣXY = 414; n=22

What is the

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