Answer:
2.5.
Step-by-step explanation:
The value of f at the bottom of the loops.
Answer:
The
3
mile cab ride includes a basic charge as well as the cost for the distance covered.
For a
6
mile trip, the cost is
$
4.80
which means that :
The cost of
3
miles is
$
4.80
−
$
3.00
=
$
1.80
Therefore the cost for
1
mile is
$
1.80
÷
3
=
$
0.60
The basic fee for hiring the cab is
$
3.00
−
$
1.80
=
$
1.20
So the total cost,
c
for a trip of
d
miles will be:
c
=
0.6
d
+
1.2
Check:
If
d
=
3
c
=
0.6
(
3
)
+
1.2
=
3
If
d
=
6
c
=
0.6
(
6
)
+
1.2
=
4.8
Step-by-step explanation:
Hey there!☺
3c/3 = 15/3 Divide both sides by 3
15/3 = 5 Simplify 15/3
c = 5
Hope this helps!
Answer:
Step-by-step explanation:
Data given
represent the sample mean obtained
represent the sample deviation obtained
represent the true mean (variable of interest)
n=400 represent the sample size selected
Solution to the problem
The best estimator for the true mean 
is given by the sample mean 
, and the reason is: If we assume that in tha random sample 
each observation follows a normal distribution like this:
Then when we find the expected value for the sample mean we have this:
If we use the properties of the expected value we have:
And since the expected value of each observation is the same we have:
So then we have that the best estimator for the population mean is given by:
