This is the answer ......
 
        
        
        
Is there any choices for it
        
             
        
        
        
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Answer:
4 units
Step-by-step explanation:
3-2=1 unit
7-3=4 units
1*4=4 units
 
        
             
        
        
        
Answer:
1. i Sampling bias and 
    ii. Question order bias
2. Non response Bias
3.i. sampling bias
ii.question order bias
4. i. response bias
ii.sampling bias
Step-by-step explanation:
we have basically four types of bias in a research which are;
1. Sampling bias
2. Response bias
3. Non response bias
4. Question order bias