This statement is false, in a biased sample every member does not have an equal chance of getting selected.
If some individuals or groups from the population are not represented in the sample, the sample is biased.
Example of a biased sample:
The graph presented in the figure below, represents the drug usage by school students but this is a biased data because it does not include the students who have already passed out from the school or the students who were studying from home, as this data is not the complete data hence it is an example of a biased sample.
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Answer:
false
Step-by-step explanation:
Part 3- If 6.5 is 22% of a value, what is the value? (round to the nearest tenth)
Part 4- If 6 is 33% of the value, what is the value?
2x + 2y = 4
what is the solution of the system of equations?
Answer:
System of Linear Equations entered :
[1] 4x - 3y = 15
[2] 2x + 2y = 4
Step-by-step explanation:
// Solve equation [2] for the variable y
[2] 2y = -2x + 4
[2] y = -x + 2
// Plug this in for variable y in equation [1]
[1] 4x - 3•(-x +2) = 15
[1] 7x = 21
// Solve equation [1] for the variable x
[1] 7x = 21
[1] x = 3
// By now we know this much :
x = 3
y = -x+2
// Use the x value to solve for y
y = -(3)+2 = -1
Solution :
{x,y} = {3,-1}
Answer:
{3,-1}
Step-by-step explanation:
Answer:
x² + 2x - 48
Step-by-step explanation:
Given
(x - 6)(x + 8)
Each term in the second factor is multiplied by each term in the first factor, that is
x(x + 8) - 6(x + 8) ← distribute both parenthesis
= x² + 8x - 6x - 48 ← collect like terms
= x² + 2x - 48