Answer: 1.303639
Step-by-step explanation:
The t-score for a level of confidence  is given by :_
 is given by :_
 , where df is the degree of freedom and
, where df is the degree of freedom and  is the significance level.
 is the significance level.
Given : Level of significance : 
Then , significance level : 
Sample size : 
Then , the degree of freedom for t-distribution: 
Using the normal t-distribution table, we have
 
Thus, the t-score should be used to find the 80% confidence interval for the population mean =1.303639
 
        
             
        
        
        
16.5/3 = 5.5
Step-by-step explanation:
becuase he needs to walk 16.5 miles. and he can walk 3 miles per x(hour)
you need to devide distance by speed to get time. 
 
        
             
        
        
        
Answer:
96
Step-by-step explanation:
U is the midpoint of TV, so mTU is half of mTV or mTV = 2 * mTU, so
mTV = 2 * mTU
11x + 8 = 2 (6x)
11x + 8 = 12x
8 = x
mTV = 11x + 8 = 11(8) + 8 = 88 + 8 = 96
 
        
             
        
        
        
784 adult tickets
Adult + children’s tickets = 1488
(1488-80)/2+80= adult tickets