Answer:
Yes. The male and female consumers differ in the amounts they spend.
Step-by-step explanation:
We can express the null and alternative hypothesis as:

It is assumed a significance level of 0.05.
The standard deviation of the difference of means is calculated as:

The test statistic is 

The degrees of freedom are:

The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.
We can conclude that male and female consumers differ in the amounts they spend.
 
        
             
        
        
        
Answer:

Step-by-step explanation:


 
        
             
        
        
        
Answer:
-70
Step-by-step explanation:
 
        
             
        
        
        
Answer:
X=4
Step-by-step explanation:
4*4=16+7=23
 
        
                    
             
        
        
        
respuesta:primero verdadero
segundo : no