Answer:

Step-by-step explanation:
The explanation of given question is described below:
Here, the test of hypothesis states that

The test statistic is


= 2.1
According to the given data α = 0.05,
So, the major value is

(refer to the standard normal table)
.
Finally

Can you write the question well because i don't get it.
Answer:
Option B 
Step-by-step explanation:
we know that
The area of the rectangle room, is equal to

where
L is the length
W is the width
we have


Remember that
1 yard= 3 feet
Convert yards to feet


The area is equal to

No, a proportion will have a constant for the ratio m/d
If m = 0.75d, then ratio m/d = (0.75d)/d = 0.75
In this example, the ratio is (.75d-2)/d = 0.75 - (2/d).
Therefore, it is not proportional.