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.
Accident Investigation. Definition - What does Accident Investigation mean? Accident investigation is a process of systematic collection and analysis of information relating to a accident that led to the loss of property, time or health of individuals, or even the loss of lives. Accident investigation is the scientific and academic analysis of the facts that occurred during an accident. An investigation is conducted to identify the root cause of an accident in an effort to make recommendations or take corrective actions to prevent the future occurrence of the same or a similar event.