In 2010, an advertising agency stopped paying bonuses to executives who attracted new clients. In 2011, the agency signed no new clients. This example illustrates:

Experiences determine which phenotypes emerge, and genotypes influence the nature of experiences

Indicate whether the statement is true or false

When the experimental method has been used, and a significant difference is established between the means of two sample groups, then it is highly probable that

a. the sample groups could not have been equivalent to start with b. the sample groups now represent different populations c. the sample groups still represent a single population d. the population parameters are known