Step-by-step explanation:
Answer is 99. I am pretty sure.
 
        
             
        
        
        
6.4 - 2x - 6.63x = 610.5
subtract 6.4 from both sides 
-2x -6.63x =604.1
collect like terms 
-8.63x = 604.1
divide both sides by -8.63
x= -70
        
             
        
        
        
The random sample of the students is an illustration of sampling
The chi-square test for goodness of fit is inappropriate because the variable under study is not categorical.
<h3>How to determine the reason chi square is not appropriate?</h3>
The dataset is given as:
Monday        34
 Tuesday       29
Wednesday   32
Thursday        28
Friday             19
The variable of the above dataset is a not a categorical dataset.
One of the conditions of the chi-square test for goodness of fit test is that the variable under study must be categorical.
Hence, the chi-square test for goodness of fit is inappropriate because the variable under study is not categorical.
Read more about chi-square test at:
brainly.com/question/19959558
 
        
             
        
        
        
Answer:
19.85
Step-by-step explanation:
158.80 divided by 8 is 19.85
 
        
             
        
        
        
Answer:
108
Step-by-step explanation: