Answer:
a) Sample of households using cell-phone only in a particular region or in a country.
b) It has to be Systematic sampling techniques
Step-by-step explanation:
a) Since the goal of the organization is to estimate the number of cell phone only households. Only households that uses cell-phone only is the appropriate population to sample from. The first step is to identify the households that fall into the population of interest. Then number them systematically and sample from the frame.
b) The moment an household is selected into the sample from the frame, the researcher can visit to conduct the survey. Or, he or she can use other method of data collection such as phoning the household before physical visit, etc.
Answer:
0.58
Step-by-step explanation:
3.48 divided by 6 is 0.58
Answer:
-6+x
Step-by-step explanation:
Let the number=n
x-n=6
-n=6-x
n=-6+x
Answer: x=5 and x=-1
Step-by-step explanation:
X^2-4x-5=0
(X-5) (x+1)=0
X-5=0. And. X+1=0
Answer: The answer is 8.
Step-by-step explanation: The first step is to convert the expression into figures. We shall call the unknown number Y. So if we are told “the square of a number,” that means Y squared, or better still, Y^2. Further we are told “the difference between the square of a number and 40” and that can be written as;
Y^2 - 40.
Next we are told that this expression is equal to 3 times that number (that is 3Y). That can now be written out as follows,
Y^2 - 40 = 3Y
If we move all expressions to one side of the equation, what we would have is,
Y^2 - 3Y -40 = 0
(Remember that when a positive value crosses to the other side of an equation it becomes negative and vice versa)
We now have a quadratic equation
Y^2 -3Y - 40 = 0
By factorizing we now have
(Y -8) (Y + 5) = 0
Therefore Y - 8 = 0 or
Y + 5 = 0
Hence, Y = 8 or Y = -5
Since we are asked to calculate the positive solution, Y = 8
