Answer:
Step-by-step explanation:
Given
----- variance
------------ sample
Required
Determine the S.E
The estimated standard error (S.E) for the sample mean is calculated using the following formula:
Where
So:
Hence: the estimated standard error for the sample mean is 2
The value of x when the triangle and the parallelogram have the same area is 6 units
<h3>The dimensions</h3>The dimension of the parallelogram is given as:
The dimension of the triangle is given as:
The area of a shape is the amount of space it occupies
The area of the parallelogram is calculated as:
The area of the triangle is calculated as:
Both areas are equal.
So, we have:
Divide both sides by x
Subtract 4 from both sides
Hence, the value of x is 6 units
Read more about areas at: