Answer: The data is a random sample from the population of interest.
 And
Individual observations can be considered independent.
Step-by-step explanation:
On khan academy 
 
        
             
        
        
        
Answer:
1.9
Step by step answer 
step1 finding the mean 
(7+4+7+7+2+10+12+8+7+5)/10 = 6.9
step2 Difference between each data 
Difference between 7 and 6.9 is 0.1
Difference between 4 and 6.9 is 2.9
Difference between 7 and 6.9 is 0.1
Difference between 7 and 6.9 is 0.1
Difference between 2 and 6.9 is 4.9
Difference between 10 and 6.9 is 3.1
Difference between 12 and 6.9 is 5.1
Difference between 8 and 6.9 is 1.1
Difference between 7 and 6.9 is 0.1
Difference between 5 and 6.9 is 1.9
step3 add all the Difference 
0.1 + 2.9+0.1+0.1+4.9+3.1+5.1+1.1+1.9 = 19.4
step4 divde it by n
19.4/10 = 1.9
so the answer is 1.9
 
        
             
        
        
        
9514 1404 393
Answer:
   6.4 ounces
Step-by-step explanation:
10% of 64 ounces is ...
   0.10 × 64 = 6.4 . . . . ounces
Cam needs to drink 6.4 ounces to reach the recommended amount.
 
        
             
        
        
        
Answer:
x  =  2000 cameras
Step-by-step explanation:
C(x)     Total cost in producing  x units
C- = C(x) /x   Average cost of producing x units    x > 0
Cannon Precision Instrument
C (x)   Total monthly cost for producing x units of M1 cameras
is    C(x)  =  0.0025x²  + 80x  +  10000
Then average cost of producing x cameras M1 is
C-(x)  =  ( 0.0025x²  + 80x  +  10000)  /x
C-(x)  =   0.0025x  + 80  + 10000/x
Taking derivatives on both sides of the equation
C-´(x)   =  0.0025   -  10000/x²
Then
C-´(x)   = 0
( 0.0025x² - 10000 ) / x²   =  0
0.0025x² - 10000 =  0
x²  =  10000 /0.0025         x²  = 4000000
x  =  2000 cameras