The shape of the distribution is rectangular, also Uniform and Symmetrical
9514 1404 393
Answer:
B. -0.2 + (-4.9)
Step-by-step explanation:
Subtracting a number is the same as adding its opposite. Subtracting 4.9 is the same as adding -4.9.
The appropriate choice is ...
-0.2 + (-4.9)
Answer:
A: The coefficient changes from 120 to 117, and the base changes from 1.033 to 1.035. The function that represents the second model is A(t)=117(1.035)^t.
Step-by-step explanation:
luxury tax you get only the amount that you need
Answer:
1, 2, 3, 6, 9, 18, 27, 54.
Step-by-step explanation:
factors:
1, 2, 3, 6, 9, 18, 27, 54.
Therefore, all the factor pairs for 54 is 1, 2, 3, 6, 9, 18, 27, 54..
Answer:
The 85% confidence interval for the mean number of toys purchased each year is (6.7, 6.9).
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
![\alpha = \frac{1 - 0.85}{2} = 0.075](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B1%20-%200.85%7D%7B2%7D%20%3D%200.075)
Now, we have to find z in the Ztable as such z has a pvalue of
.
That is z with a pvalue of
, so Z = 1.44.
Now, find the margin of error M as such
![M = z\frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=M%20%3D%20z%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
In which
is the standard deviation of the population and n is the size of the sample.
![M = 1.44\frac{2.1}{\sqrt{686}} = 0.1](https://tex.z-dn.net/?f=M%20%3D%201.44%5Cfrac%7B2.1%7D%7B%5Csqrt%7B686%7D%7D%20%3D%200.1)
The lower end of the interval is the sample mean subtracted by M. So it is 6.8 - 0.1 = 6.7
The upper end of the interval is the sample mean added to M. So it is 6.8 + 0.1 = 6.9
The 85% confidence interval for the mean number of toys purchased each year is (6.7, 6.9).