First quarter (Q1): Oct. 1 through Dec. 31 Second quarter (Q2): Jan. 1 through March 31 Third quarter (Q3): April 1 through June 30 Fourth quarter (Q4): July 1 through Sept. 30 Everyone knows what ...
To find the interquartile range, subtract the value of the lower quartile Q1 from the value of the upper quartile Q3. A school librarian ... smallest to largest. A box plot is a diagram which ...
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