To increase confidence that a sample is representative of the population, survey researchers utilize __________ in order to select the sample

For the Pearson r, the degrees of freedom are a direct function of the

number of pairs of scores. Indicate whether the statement is true or false

A farmer applies pesticides to a crop to save it from insect damage. Although the farmer benefits immediately from using pesticides, other farmers follow suit and the local water system is eventually damaged permanently. This is an example of

a. a carbon-neutral lifestyle. b. the cost-benefit ratio. c. learned helplessness. d. the tragedy of the commons.