Answer:
An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 were no-shows. At α=0.01, test the airline's claim. State the sample percentage and round it to three decimal places.
State the hypotheses.
State the critical value(s).
State the test statistics.
State the decision
State the conclusion.
 
        
             
        
        
        
Answer:
The speed of the boat in still water = 8 Km/hr
Step-by-step explanation:
Let the speed of the boat be x
According to question 
(x-4)15 = (x+4)5
3x-12 = x+4
⇒x = 8 km/hr
 
        
             
        
        
        
Answer:
{x:x is a natural number less than 6}
Step-by-step explanation:
Set builder is a type of set where we have to represent any value inside a set 
by using the variable x, v, b, a, c etc.
Eg A={1,2,3,4}
 For eg {a: a is a natural number less than 5}
 
        
             
        
        
        
Karl ate 5/6 of a small bag of popcorn .