Red Cross laboratory The Red Cross hospital has a laboratory where blood tests are conducted. Monthly costs are given, as well as the number of blood monsters (samples) examined each month (see data, also available in the datasheet).

Required:
1. Analyse the cost data. Comment on the quality of the regression results. Are they reliable?
2. Additional information conveyed that in Month 19 new equipment was installed in the lab. Please estimate the impact of the new machine on the lab’s total costs and on its cost components.

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Red Cross Lab, monthly data Months Costs Samples Months Costs Samples 1 101778 1459 19 98015 1035 2 79067 1056 20 114508 1685 10 34567890 109718 1752 21 105218 1230 98769 1477 22 122 193 1986 102785 1462 23 123118 1864 97066 1566 24 125283 2356 109736 2034 25 119263 1952 91900 1653 26 117736 1453 90322 1054 27 112746 1681 93524 1157 28 121277 1933 11 67887 800 29 107819 1234 12 74587 1025 30 110048 1685 13 105675 1837 31 117167 1864 14 15 45 74132 712 32 101291 1122 85745 1020 33 133851 2486 16 93657 1466 34 114635 1684 17 88520 1055 35 125692 2403 18 81923 954 36 125801 2438