Part a)
The simple random sample of size n=36 is obtained from a population with
and
The sampling distribution of the sample means has a mean that is equal to mean of the population the sample has been drawn from.
Therefore the sampling distribution has a mean of
The standard error of the means becomes the standard deviation of the sampling distribution.
Part b) We want to find
We need to convert to z-score.
Part c)
We want to find
We convert to z-score and use the normal distribution table to find the corresponding area.
Part d)
We want to find :
We convert to z-scores and again use the standard normal distribution table.
The andwer would be 136 beause you would have to multiply 9 and 10 to get its area in square feet, then you would have to add the answer to that problem(90) to 46 square feet, and your answer would be 136
Answer:
$41.25
Step-by-step explanation:
We can use this formula to solve this problem:
s
=
p
−
(
d
×
p
)
Where:
s
is the sales price: what we are solving for in this problem.
p
is the original price: $55 for this problem.
d
is the discount rate: 25% for this problem. "Percent" or "%" means "out of 100" or "per 100", Therefore 25% can be written as
25
100
.
Substituting and calculating
s
gives:
s
=
$
55
−
(
25
100
×
$
55
)
s
=
$
55
−
$
1375
100
s
=
$
55
−
$
13.75
s
=
$
41.25
