The most common and obvious fossils are the preserved skeletal remains of animals. Other fossils, which are also evidence of past organisms, include leaf impressions, tracks and trails, burrows, droppings, and root casts.
Lesson Summary. Non-experimental research does not mean nonscientific. Non-experimental research means there is a predictor variable or group of subjects that cannot be manipulated by the experimenter. Typically, this means that other routes must be used to draw conclusions, such as correlation, survey or case study.
Nonresponse in IS/Sivo et al. Journal of the Association for Information Systems Vol. 7 No. 6, pp. 351-414/June 2006 353 questionnaires for eliciting opinions in empirical IS research, little information exists in the IS literature on the adequate response rate for mail questionnaires, and further, on