Is the answer A ????? I don't know, plzzzz help me
2 answers:
You might be interested in
Answer:
atleast 385
Step-by-step explanation:
Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.
Population std deviation =
Sample size =
STd error of sample mean =
Margin of error for 95% would be Critical value ( std error)
Here since population std dev is known we can use Z critical value= 1.96
Sample size should be atleast 385
First:
3 feet=1 yard
36 inches=1 yard
8 feet=2
of a yard
12 inches=1/3 of a yard.
2<u />+
=2
or 3.
Hope this helps!
3 feet=1 yard
36 inches=1 yard
8 feet=2
12 inches=1/3 of a yard.
2<u />
Hope this helps!