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Which of the following techniques are used to control extraneous variables in research? (A) Change of instrument (B) Randomisation (C) Matching (D) Removing variables (E) Changing the research method Choose the correct answer from the options given below :
Which of the following is/are the advantages of using a control chart for inspection? (i) A control chart indicates whether the process is in control or out of control. (ii) A control chart determines process variability. (iii) A control chart ensures product quality. (iv) Scrap or percentage reduction can be reduced by taking the necessary actions in time against the warnings indicated by control charts. (v) Control charts build up the reputation of the organization through customer’s satisfaction. (vi) The control chart can detect the unusual variations taking place in a process.
Which of the following are the techniques to control extraneous variables?
1. Elimination
2. Balancing
3. Constancy in the condition
4. Randomisation
5. Theoretical consideration
6. Counter balancing
Select the correct answer:
Researchers are often unable to control extraneous variables, when they use the case study method. This lesser degree of control makes it difficult to use the case study method to
In which research method manipulation of 'independent variable' and control of 'extraneous variables' is neither possible nor desirable? 
In which research method manipulation of 'independent variable' and control of 'extraneous variables' are neither possible nor desirable? 
In which of the following research methods, process of hypothesis testing optimally safeguards the role of extraneous variables?
In the question below are given two statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: A lot of humans are modern Some modern are techniques Conclusions: I. Some techniques are modern II. Some modern are humans III. Some humans are techniques
Examine the following statements about span of control and identify the ones which are true?
1. More task complexity requires narrower span of control.
2. Routine tasks can have greater span of control than exceptional tasks.
3. When tasks are dissimilar, then span of control can be larger.
4. Spans of control are generally narrower at the top and broader at the bottom of the hierarchy.
For a statement S in a program, in the context of liveness analysis, the following sets are defined: USE(S): the set of variables used in S IN(S): the set of variables that are live at the entry of S OUT(S): the set of variables that are live at the exit of S Consider a basic block that consists of two statements, S1 followed by S2. Which one of the following statements is correct?