Answer:
Step-by-step explanation:
Given that :
the null and the alternative hypothesis are computed as :


This is a two tailed test
 This is because of the ≠ sign in the alternative hypothesis which signifies that the rejection region in the alternative hypothesis are at the both sides of the hypothesized mean difference .
Decision Rule: at the level of significance ∝ = 0 . 10 
 The decision rule is to reject the null hypothesis if z < - 1 . 64 and z > 1 . 64
NOTE: DURING THE MOMENT OF TYPING THIS ANSWER THERE IS A TECHNICAL ISSUE WHICH MAKES ME TO BE UNABLE TO SUBMIT THE FULL ANSWER BUT I'VE MADE SCREENSHOTS OF THEM AND THEY CAN BE FOUND IN THE ATTACHED FILE BELOW
 
        
             
        
        
        
Answer:
After the 35 gel pens??
Step-by-step explanation:
 
        
             
        
        
        
5-1 x 20=56/56 x 90/56  54/67=67
 
        
                    
             
        
        
        
Answer:
Δ JKL ≅ ΔPQR
Step-by-step explanation:
Hopefully this was one of the following statements. You didn't post the statements
 
        
             
        
        
        
Perhaps you want to know what the number is?
3n -8 = 7
3n = 15 . . . . . add 8
n = 5 . . . . . . . divide by 3
The number is 5.