Aresearcher introduces a new mathematics program in one school district and uses a neighboring district as a no-treatment control group. after the program is in place for 6 months, the researcher intends to give the students in both districts a standardized mathematics test and then compare their scores. this research cannot be classified as a true experiment because

What impact did improvements in farming technology near the end of the nineteenth century have on the american economy? a. more energy was needed to power equipment, creating the renewable energy industry. b. less labor was necessary on farms, leading workers to pursue other jobs. c. less money was invested in farming as many locally owned farms went bankrupt. d. more demand for agricultural products reduced the price of food and animal products.

Gettysburg address question. lincoln uses the images of birth and rebirth in this address. why?

Which is relatively better: a score of 76 on a psychology test or a score of 22 on an economics test? scores on the psychology test have a mean of 90 and a standard deviation of 13. scores on the economics test have a mean of 52 and a standard deviation of 10.