Answer:
10 -.-
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring. 
Std deviation =4.5 errors
95% confidence interval = Mean±1.96*std dev
Hence we have
 
 

Sample size should be 20.
 
        
             
        
        
        
Answer:
1. yes
2. yes
3. no
4. no
Step-by-step explanation:
Replace x by each value of x.

1. yes

2. yes

3. no

4. no (this is not a solution because the value must be greater than 44 not equal to)

 
        
                    
             
        
        
        
The range would be $14.
To find the range, you would take the highest value and subtract it by the lowest value:
29 - 43 =
14
Hope this helped! :)