Don’t open the file it takes your information
        
             
        
        
        
Answer:
option (b) df = 1, 24
Step-by-step explanation:
Data provided in the question:
 levels of factor A, a = 2
 levels of factor B, b = 3
Subjects in each Sample, s = 5
n = 5 × 3 × 2 = 30
Now
df for Factor A = a - 1 
= 2 - 1 
= 1
df for Factor B = b - 1 
= 3 - 1 
= 2
df for Interaction AB = ( a - 1 ) × ( b - 1 ) 
= 1  × 2 
= 2
df for Total = n - 1 
= 30 - 1
= 29
df for error = 29 - 5 
= 24
Hence,
df values for the F-ratio evaluating the main effect of factor A is 1, 24
The correct answer is option (b) df = 1, 24
 
        
             
        
        
        
Answer:
3.69 hours
Step-by-step explanation:
y = 80.25x + 78.75 
y = 95.75 + 40
85.25x + 78.75 = 95.75 + 40
-85.25x   -40        -85.25x  -40 
38.75/10.5 = 10.5x/10.5
3.690476190..... = x
rounding
3.69 = x