Answer:
71.123 mph ≤ μ ≤ 77.277 mph
Step-by-step explanation:
Taking into account that the speed of all cars traveling on this highway have a normal distribution and we can only know the mean and the standard deviation of the sample, the confidence interval for the mean is calculated as:
≤ μ ≤ 
Where m is the mean of the sample, s is the standard deviation of the sample, n is the size of the sample, μ is the mean speed of all cars, and 
is the number for t-student distribution where a/2 is the amount of area in one tail and n-1 are the degrees of freedom.
the mean and the standard deviation of the sample are equal to 74.2 and 5.3083 respectively, the size of the sample is 10, the distribution t- student has 9 degrees of freedom and the value of a is 10%.
So, if we replace m by 74.2, s by 5.3083, n by 10 and 
by 1.8331, we get that the 90% confidence interval for the mean speed is:
≤ μ ≤ 
74.2 - 3.077 ≤ μ ≤ 74.2 + 3.077
71.123 ≤ μ ≤ 77.277
Answer:
DESPERATE PLEASE ANSWER FAST
(please show picture)
Use the data to create a scatter plot.
Savings Account Balance for a Given Year
PointMove
UndoRedoReset
Time (years)Savings account balance ($)
1
2
3
4
5
6
7
8
9
10
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
0
Time (years)
Savings account balance ($)
1
1300
2
2500
3
3600
4
4000
5
2200
6
1800
7
3200
8
9000
Step-by-step explanation:
DESPERATE PLEASE ANSWER FAST
(please show picture)
Use the data to create a scatter plot.
Savings Account Balance for a Given Year
PointMove
UndoRedoReset
Time (years)Savings account balance ($)
1
2
3
4
5
6
7
8
9
10
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
0
Time (years)
Savings account balance ($)
1
1300
2
2500
3
3600
4
4000
5
2200
6
1800
7
3200
8
9000
Your answer is xy-1<span><span>
</span></span><span>=<span><span><span><span>4<span>x2</span></span><span>y2</span></span>−<span><span>4x</span>y/</span></span><span><span>4x</span>y
</span></span></span><span>=<span><span><span><span>4x</span>y</span>−4/</span>4
</span></span><span>=<span><span>xy</span>−<span>1
</span></span></span>Hope this helps!
Step-by-step explanation:
5(x+6x-3x)
(5+30-15)x
if you open the brackets, it will be 5x+30x-15x
Jjdjddndndjndndjdjdjdjdjdndjdndndnndndndjd
