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.
What is CSI? Crime scene investigation is a science known as forensics. For every crime there is evidence left behind that can help authorities reconstruct the facts behind the incident. Skilled professionals analyze every bit of the scene until they know all the details of a crime including, sometimes, who did it.