Answer:
I think the answer is m=3 
Step-by-step explanation:
Hope this helps :D
 
        
             
        
        
        
Answer:
(25.732,30.868)
Step-by-step explanation:
Given that in a random sample of 42 people, the mean body mass index (BMI) was 28.3 and the standard deviation was 6.09.
Since only sample std deviation is known we can use only t distribution
Std error = 

t critical for 99% two tailed 
Margin of error
Confidence interval lower bound = 
Upper bound = 
 
        
             
        
        
        
X = Tan^-1(15/13)
X = 49.1