Answer: INDEPENDENT SAMPLES T-TEST
Step-by-step explanation:
Given that;
sample size n₁ = 40, sample size n₂ = 40
sample mean x₁ = 32.9, sample mean x₂ = 30.6
Standard deviation S₁ = 4.4, Standard deviation S₂ = 5.1
Now
NULL hypothesis H₀ : u₁ = u₂
and Alternative hypothesis H₁ : u₁ > u₂
Therefore based on the information provided above, the type of test that should be used to determine whether the level of nicotine are now lower than what they were 10 years ago is the INDEPENDENT SAMPLES T-TEST
Answer:
1.
2. undefined
3.
.
4.
.
5.
.
6. ![\frac{7}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B2%7D)
Step-by-step explanation:
1. The required line passes through
. The slope of the line joining the points
is given by the formula,
or ![m=\frac{y_1-y_2}{x_1-x_2}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7By_1-y_2%7D%7Bx_1-x_2%7D)
Either of them yields the same result.
Substitute
into the first formula to get,
You can write this as a mixed number to obtain:
2. The given line passes through
.
Observe that the first coordinates are the same for both points. This implies that, the line is vertical.
The slope of all vertical lines are undefined.
3. The average rate of change of the function
on the interval
is given by:
.
The given function is ![f(x)=x^2-4x](https://tex.z-dn.net/?f=f%28x%29%3Dx%5E2-4x)
![f(-2)=(-2)^2-4(-2)=12](https://tex.z-dn.net/?f=f%28-2%29%3D%28-2%29%5E2-4%28-2%29%3D12)
![f(4)=(4)^2-4(4)=0](https://tex.z-dn.net/?f=f%284%29%3D%284%29%5E2-4%284%29%3D0)
.
.
4. The given function is ![f(x)=2^x-1](https://tex.z-dn.net/?f=f%28x%29%3D2%5Ex-1)
![f(0)=2^0-1=0](https://tex.z-dn.net/?f=f%280%29%3D2%5E0-1%3D0)
![f(3)=2^3-1=7](https://tex.z-dn.net/?f=f%283%29%3D2%5E3-1%3D7)
.
.
5. From the graph
![f(3)=7,f(0)=1](https://tex.z-dn.net/?f=f%283%29%3D7%2Cf%280%29%3D1)
.
.
.
6. The given equation is :
![2y-7x=-4](https://tex.z-dn.net/?f=2y-7x%3D-4)
Add
to both sides.
![2y=7x-4](https://tex.z-dn.net/?f=2y%3D7x-4)
Divide through by 2.
![y=\frac{7}{2}x-2](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B7%7D%7B2%7Dx-2)
Compare this function to ![y=mx+b](https://tex.z-dn.net/?f=y%3Dmx%2Bb)
The slope is ![m=\frac{7}{2}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B7%7D%7B2%7D)
What magic trick??
Are you gonna do a magic??
Sorry for a lot of questions.
Answer: you carry the 2 and end up with 250$ in change okay
Step-by-step explanation:
I don’t know about math i just know
Everything
Cost
250$
Okay