b) Estimated Mean = 43.42 years of age. Estimated Variance = 256.16 Estimated Standard Deviation = = 16. m p(x) (m)p(x) m− (m−)2 (m−)2p(x) (midpoint) 21.5 0.147 3.16 479.61 70.50 −21.9 30 0.194 5.82 179.56 34.83 −13.4 40 0.256 10.24 11.56 2.96 −3.4 50 0.17 8.50 6.6 43.56 7.41 60 0.101 6.06 16.6 275.56 27.83 72.5 0.133 9.64 29.1 846.81 112.63 = 43.42 = 256.16  2 76. a)
b) Estimated Mean = 43.42 years of age. Estimated Variance = 256.16 Estimated Standard Deviation = = 16. m (midpoint) p(x) (m)p(x) m− (m−)2 (m−)2p(x) 21.5 0.147 3.16 −21.9 479.61 70.50 30 0.194 5.82 −13.4 179.56 34.83 40 0.256 10.24 −3.4 11.56 2.96 50 0.17 8.50 6.6 43.56 7.41 60 0.101 6.06 16.6 275.56 27.83 72.5 0.133 9.64 29.1 846.81 112.63  = 43.42 2 = 256.16 76. a)
Solution-Manual-Understanding-Business-Statistics-1st-Edition-Freed.docx