Two types of instruments for measuring the amount of sulfur monoxide in the atmosphere are compared in an air-pollution experiment. It is desired to determine whether the two types of instrument yield the equal mean measurement. The following readings were recorded for the two instruments:
Sulfur Monoxide
Instrument A
0.96
0.82
0.75
0.61
0.89
0.64
0.81
0.68
0.65
Instrument B
0.87
0.74
0.63
0.55
0.70
0.69
0.57
0.53
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