Answer:
We are confident that the true mean for the average income of all U.S. households is between (58820;71180)
Step-by-step explanation:
Information provided
represent the sample mean for the average income of all US households
population mean
s=15000 represent the sample standard deviation
n=25 represent the sample size
Confidene interval
The confidence interval for the true mean of interest is given by the following formula:
(1)
The degrees of freedom are given by:
The Confidence level is is 0.95 or 95%, then the significance is and , the critical value for this case would be
Replacing in formula (1) we got:
We are confident that the true mean for the average income of all U.S. households is between (58820;71180)
Answer:
$28,875
Step-by-step explanation:
First, we would have to find 10% of $25,000
10% of $25,000 = $2,500
Now, we have to add the 2 values together
$25,000 + $2,500 = $27,500
Now, we can find the shipping fee, since it includes the engineering fee
5% of $27,500 = $1,375
Now, we can add the shipping fee to find the total
$27,500 + $1,375 = $28,875
Answer:
Answer:
Step-by-step explanation:
you are given two points (0,6) and (2,1)
the equation is y=mx+b it says that the graph has a y-intercept (0,6) from this point you take the y-value which is also ur b-value in the equation to find m you need to do y2-y1/x2-x1
Answer:
<1 = 97
<2 = 83
<7=87
<8 = 83
<11 = 112
<12 = 68
<13 = 112
<14 = 68
Step-by-step explanation:
Those are the only ones Ik sry
Answer:
Step-by-step explanation:
1.In the equation there is no y-intercept so it will be at 0
2.The slope or rise over run is 3/1 and is positive because there are no negative signs. Going up 3 and to the right 1 is how to mark the points on your graph and the opposite side will be doing a -3 and -1 by going down three from the 0 points and to the left 1.
3.As seen in the graph there are the points given and the line directed on them.
4.We already determined that our slope is positive
m=3
b=0