Posted by **Allen** on Friday, May 27, 2011 at 12:15pm.

Here's a frequency distribution table for the speeds of a sample of automobiles.

Speed(MPH) Frequency Midpoint(I found)

50-54 2 52

55-59 4 57

60-64 5 62

65-69 10 67

70-74 9 72

75-79 5 77

I am trying to find the variance but whatever I do I can't seem to find the answer.

The choices are

c.48.570

d.50.00

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