In order to determine an interval for the mean of a population with unknown standard deviation a sample of 61 items is selected. The mean of the sample is determined to be 23. The number of degrees of freedom for reading the t value is a. 22 b. 23 c. 60 d. 61.
Learner's definition of INVESTIGATE 1 : to try to find out the facts about (something, such as a crime or an accident) in order to learn how it happened, who did it, etc.
Princeton's WordNet(1.00 / 1 vote)Rate this definition: 1  research, search, explore(verb) inquire into. the students had to research the history of the Second World War for their history project; He searched for information on his relatives on the web; Scientists are exploring the nature of consciousness.