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.
verb (used with object), examined, examining. 1. to inspect or scrutinize carefully: to examine a prospective purchase. 2. to observe, test, or investigate (a person's body or any part of it), especially in order to evaluate general health or determine the cause of illness. 3. to inquire into or investigate: