1. Data:
Nilai f
60-64 2
65-69 6
70-74 15
75-79 20
80-84 16
85-89 7
90-94 4
Nilai f Xt fXt Mx Xt-Mx f(Xt-Mx)
60-64 2 62 124 77.64 15.64 31.29
65-69 6 67 402 77.64 10.64 63.86
70-74 15 72 1080 77.64 5.64 84.64
75-79 20 77 1540 77.64 0.64 12.86
80-84 16 82 1312 77.64 4.36 69.71
85-89 7 87 609 77.64 9.36 65.50
90-94 4 92 368 77.64 14.36 57.43
70 5435 385.29
Mx 77.64
SR 5.50