Question: Alan is a facility manager who carried out a study about the monthly electricity bill (In HKSIOD) of the shop. He then randomly selected previous

Alan is a facility manager who carried out a study about the monthly electricity bill (In HKSIOD) of the shop. He then randomly selected previous 48 months' data for analysis and listed as follows. 2.34 4.11 5.5 5.3 5.99 4.07 4.05 5.11 2.71 5.59 5.55 i10.07+0.1x7' 1.45 5.79 2.95 5.51 7.49 5.59 7.35 3.79 3.54 5.73 5.51 19.oa+o.1xu 199 9.2 5.35 5.99 9.57 8.51 8.32 4.91 5.03 5.28 10.09+0.1X3 16 5.93 8.93 8.56 164 8.26 8.0? 6.44 9.73 6.42 10.06+0.1>
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