The mean is usually the best measure of central tendency to use when your data distribution is continuous and symmetrical, such as when your data is normally distributed. However, it all depends on what you are trying to show from your data.
Answer:
(7, 0).
Step-by-step explanation:
Where the diagonal lines overlap to form squares is where the solutions to the inequality lies.
The point (7, 0) lies in that region.
Answer:
The number of people surveyed was 330.
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for the population proportion is:
The margin of error for this interval is:
The information provided is:
The critical value of <em>z</em> for 94% confidence level is, <em>z</em> = 1.88.
*Use a <em>z</em>-table.
Compute the value of <em>n</em> as follows:
![n=[\frac{z_{\alpha/2}\times \sqrt{\hat p(1-\hat p)}}{MOE}]^{2}](https://tex.z-dn.net/?f=n%3D%5B%5Cfrac%7Bz_%7B%5Calpha%2F2%7D%5Ctimes%20%5Csqrt%7B%5Chat%20p%281-%5Chat%20p%29%7D%7D%7BMOE%7D%5D%5E%7B2%7D)
![=[\frac{1.88\times \sqrt{0.37(1-0.37)}}{0.05}]^{2}\\\\=(18.153442)^{2}\\\\=329.5475\\\\\approx 330](https://tex.z-dn.net/?f=%3D%5B%5Cfrac%7B1.88%5Ctimes%20%5Csqrt%7B0.37%281-0.37%29%7D%7D%7B0.05%7D%5D%5E%7B2%7D%5C%5C%5C%5C%3D%2818.153442%29%5E%7B2%7D%5C%5C%5C%5C%3D329.5475%5C%5C%5C%5C%5Capprox%20330)
Thus, the number of people surveyed was 330.
Answer:
-2
The problem:
y=f(x)=x^2+x
find the slope of the secant line joining (-3,f(-3)) and (0,f(0))
Step-by-step explanation:
We need to first find the values that correspond to f(-3) and f(0).
f(-3) can be found by replacing the x's in f(x)=x^2+x with (-3):
f(-3)=(-3)^2+(-3)
f(-3)=9+-3
f(-3)=6
f(0) can be found by replacing the x's in f(x)=x^2+x with (0):
f(0)=(0)^2+(0)
f(0)=0+0
f(0)=0
So we want to find the slope of the line going through the points:
(-3,6) and (0,0)
Line them up-doesn't matter which point goes on top:
(-3,6)
(0,0)
---------Now subtract!
-3 , 6
The rise goes over the run so the slope is 6/-3 which simplifies to -2.
