How many of the following statements is/are correct? -Two variables are said to be confounded when their effects on the response cannot be separated
-The purpose of an observational study is to avoid confounding and to establish causation
- A specific set of experimental conditions applied to the units is called a treatment.
-Matched pairs design is one of the simple and common type of observational studies.
Select one:
a. 3
b. 0
c. 2
d. 4
e. 1

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(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

just sum

10 + 10 = 20