A manufacturing company is promoting its new energy efficient 12 W light bulbs to produce 1100 lumens (which is the same amount as a 75w incandescent bulb). An internal testing of the recent production shows that bulbs didn't meet the advertised claim. However, later it was found that testing equipment itself was in need of calibration and it was underestimating the lumens of the light bulbs. This is an example of:

Type error

Type II Error

Alpha

Level of significance