Answer:
As
, it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.
Step-by-step explanation:
1. Relevant data:

2. Hypotesis testing


3. Find the rejection area
From the one tail standard normal chart, whe have Z-value for
is 1.56
Then rejection area is left 1.56 in normal curve.
4. Find the test statistic:


5. Hypotesis Testing


As
, it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.
Answer:
You need to draw a horizontal line that goes through the point (0,4).
Step-by-step explanation:
Slope of zero means it does not go up or down. It looks like this ↔, but stretched out to the two sides of the graph.
Dy/dx = -y inx iny
(y in x in y) dx + dy = 0
(y in x in y ) dx = - dy
(in x )dx = - (1/ y in y) dy
you just need to integrate both sides
Hope this helps