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Posted by on Thursday, August 25, 2011 at 3:46pm.

Find the range and the variance (correct to one decimal place). 78,91,93,93,99

  • statistics - , Thursday, August 25, 2011 at 6:52pm

    range=max-min=99-78=21
    sample mean=(78+91+93+93+99)/5=90.8
    (78-90.8)^2=163.84
    (91-90.8)^2=0.04
    (93-90.8)^2=4.84
    (99-90.8)^2=67.24
    sample variance=(163.84+0.04+4.84+4.84+67.24)/4=60.2

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