|  | a. | Estimate that  is in an interval between 2 and  10 with 95% confidence | 
    |  | b. | Estimate that  is in an interval between ?2 and  8 with 95% confidence | 
    |  | c. | Estimate that  is in an interval  between 2 and 10 with 90% confidence | 
    |  | d. | Estimate that  is in an interval between ?2 and  8 with 90% confidence | 
    
 Which of the following confidence intervals also indicates a significant difference between treatments with italic alpha equal 0.05 ? a.            Estimate that italic mu subscript 1 minus italic mu subscript 2 is in an interval between 2 and 10 with 95% confidence b.            Estimate that italic mu subscript 1 minus italic mu subscript 2 is in an interval between -2 and 8 with 95% confidence c.            Estimate that italic mu subscript 1 minus italic mu subscript 2  is in an interval between 2 and 10 with 90% confidence d.            Estimate that italic mu subscript 1 minus italic mu subscript 2 is in an interval between -2 and 8 with 90% confidence 
Answer: a
 Because it does not include 0