Populations may be _____________ or ________________________. Areal population is one in which all observations are______________________________ at the time of sampling. Ahypothetical population is one in which all observations are_____________________________ at the time of ___________________.Often it is not convenient or even possible to include allobservations in a research project. In such cases, a_____________________ or subset of observations is taken. The sizeof the sample is partially determined by estimated___________________________among observations and by an acceptableamount of _______________________. In order to use inferentialstatistics, the analysis must be based on a ____________________sample. A sample is random, if at each stage of the sampling, theselection process guarantees that all remaining __________________have ____________________ chances of being selected. Theobservations in a randomly selected sample should be___________________ of those in the population. However, there isno guarantee of this. The term random describes the process, andnot necessarily the outcome. One of the best-known techniques forselecting a random sample is the ________________ method. Allobservations must be represented on slips of paper that aredeposited in a bowl and _________________. The through stirring isa very important aspect of this method of sample selection. Anothermethod for generating a random sample involves the use of the tableof ____________ numbers. When using this table, the number ofdigits actually used is determined by the ______________________________. This method is not very efficient for obtaininga sample from a ____________ population. In an experiment, althoughsubjects may not be selected randomly, they should be randomlyassigned to either the experimental or control condition. Thepurpose of random assignment is to make sure that, except for__________________ differences, groups of subjects are similar withrespect to any ____________________________________________. It isusually desirable that _____________ numbers of subjects beassigned to the experimental and control groups. To accomplishthis, assignment should be done in ______________________.