Answer:
The 95% confidence interval for the average number of years until the first major repair is (3.1, 3.5).
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for the average using the finite correction factor is:

The information provided is:

The critical value of <em>z</em> for 95% confidence level is,
<em>z</em> = 1.96
Compute the 95% confidence interval for the average number of years until the first major repair as follows:


Thus, the 95% confidence interval for the average number of years until the first major repair is (3.1, 3.5).
4^4 * 4^(-9) = 4^(4-9) = 4^(-5) or 1/(4^5)
Find out the statement true regarding the diagram given in the question
Answer
the statement is true regarding the diagram is
m∠WXY + m∠YXZ = 180°
REASON
As shown in the diagram
∠WXY and ∠ YXZ are supplementary angles.
Supplementary angle definition
Two Angles are said to be Supplementary when there sum is equal to 180 °.
thus we get
m∠WXY + m ∠YXZ = 180 °
Therefore the m∠WXY + m∠YXZ = 180° is the true statement.
If it goes through the origin of a graph