There will be no odd number in the units place for any product of 8.
5.2 pound of meat is your answer
(q - 3/4)(q + 1/4)
First - q x q = q^2 ( q squared)
Outer - q x 1/4 = 1/4q
Inner - 3/4 x q = - 3/4q
Last - -3/4 x 1/4 = - 3/16
Add all in that order, combine like terms if necessary.
q^2 - 2/4q - 3/16
A is the weight
B is the frequency
C is weight times frequency
D is mean minus weight
E is D raised to the 2nd power ; variance
F is E times frequency ; total variance
A B C D E F
65 1 65 7.97 63.47 63.47
68 2 136 4.97 24.70 49.40
69 5 345 3.97 15.76 78.80
70 8 560 2.97 8.82 70.57
71 7 497 1.97 3.88 27.17
72 3 216 0.97 0.94 2.82
90 2 180 17.03 290.02 580.04
95 <u> 2 </u> <u> 190 </u> 22.03 485.32 <u> 970.64</u>
30 2,189 1,842.91
2,189 / 30 = 72.97 mean
1,842.91 / 30 = 61.43 variance
√61.43 = 7.8377 or 7.84 standard deviation.
< 1 is the angle has the same measurement as < 3 ( alternate interior angles )