8. Which formula is used to solve for the number of class interval?
A. n
B. [tex] \frac{1}{n} [/tex]
C. [tex] \sqrt{n} [/tex]
D. [tex] \frac{1}{ \sqrt[1]{n} } [/tex]
A. n
B. [tex] \frac{1}{n} [/tex]
C. [tex] \sqrt{n} [/tex]
D. [tex] \frac{1}{ \sqrt[1]{n} } [/tex]
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c? not sure
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