Describe the fundamental flaw that prevents a pre-post design from being a true experiment.(That is,why can't these designs produce an unambiguous cause-and-effect explanation?)Explain how the series of observations before the treatment help reduce this problem.

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The Answer of Describe the fundamental flaw that prevents a pre-post design from being a true experiment.(That is,why can't these designs produce an unambiguous cause-and-effect explanation?)Explain how the series of observations before the treatment help reduce this problem.

Describe the Fundamental Flaw That Prevents a Pre-Post Design from Being