12.70 Lumber moisture content (MC) must he monitored during drying in order to maximize the lumber quality and minimize the drying coats.Four types of moisture meters were studied on three levels of moisture content in lumber by Breiner, Arganbright, and Pong (Forest Products Journal, 37(4), 1987, pp. 9–16). Of the four meters used, two were handheld (resistance and power-loss types) and two were in-line (high- and low-frequency). From a At the 5% level of significance, compare mean distances for the three semi-active dampers.
b At the 5% level of significance, compare mean interstory drifts for the three semiactive dampers.
c At the 5% level of significance, compare mean absolute acceleration for the three semi-active dampers.
d At the 5% level of significance, compare mean distances for all five groups.
e At the 5% level of significance, compare mean interstory drifts for all five groups.

f At the 5% level of significance, compare mean absolute acceleration for all five groups.
g Looking at the interstory drifts, is it better to have brushless DC dampers than none at all?
Justify your answer.