I think the correct answer would be the second option. The statement tha is correct concerning correlation coefficients would be that a correlation of +.89 and -.89 are both strong and equal. A correlation coefficient is a value that measures dependence and correlation between variables. It would have a value ranging from -1 to +1. So, the last option would be wrong. A value of zero would represent that there is no relation between the variables. The negative and positive indicates the direction of their correlation. If you have a negative sign, then it means that as one value increases the other would decrease. For a negative value, as one value increase, the other value would increase as well.
Answer: dry scrubbers are less than 10% efficient at removing particles less than 1μm in size
Explanation:
A dry scrubber or dry scrubber system is one type of scrubber that is used to remove harmful materials from industrial exhaust gases before they are released into the environment. That substance then falls out of the gas stream or is caught in a particle screen.
