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.
investigation (ÉªnËvÉstÉªËÉ¡eÉªÊÉn) n the act or process of investigating; a careful search or examination in order to discover facts, etc inËvestiËgational adj. inâ¢vesâ¢tiâ¢gaâ¢tion (ÉªnËvÉs tÉªËgeÉª ÊÉn) n. 1. the act or process of investigating or the condition of being investigated.