Answer:
Step-by-step explanation:
From the information given :
The null hypothesis ![H_o : \sigma = 60](https://tex.z-dn.net/?f=H_o%20%3A%20%5Csigma%20%3D%2060)
The alternative hypothesis ![Ha : \sigma \neq 60](https://tex.z-dn.net/?f=Ha%20%3A%20%5Csigma%20%5Cneq%2060)
Given that:
the sample size n = 21
sample standard deviation s = 68
population standard deviation σ = 60
a) The level of significance ![\alpha =0.01](https://tex.z-dn.net/?f=%5Calpha%20%3D0.01)
b) The chi-square statistics can be calculated as:
![\bar X = \dfrac{(n-1)s^2}{\sigma^2}](https://tex.z-dn.net/?f=%5Cbar%20X%20%3D%20%5Cdfrac%7B%28n-1%29s%5E2%7D%7B%5Csigma%5E2%7D)
![\bar X = \dfrac{(21-1)68^2}{60^2}](https://tex.z-dn.net/?f=%5Cbar%20X%20%3D%20%5Cdfrac%7B%2821-1%2968%5E2%7D%7B60%5E2%7D)
![\bar X = \dfrac{(20)4624}{3600}](https://tex.z-dn.net/?f=%5Cbar%20X%20%3D%20%5Cdfrac%7B%2820%294624%7D%7B3600%7D)
![\bar X = 25.69](https://tex.z-dn.net/?f=%5Cbar%20X%20%3D%2025.69)
The degree of freedom is :
= n - 1
= 21 - 1
= 20
Answer:
C: (2x-10)
Step-by-step explanation:
(4x - 3) - (2x + 7)
In -(2x+7), think of it as -1(2x+7) which is equal to:
-1*2x + -1*7 =
-2x - 7
Now we add this to 4x-3
4x - 3 - 2x - 7
Combining like terms gives us:
2x - 10
Answer:
To find the surface area of a rectangular solid, remember that each face is a rectangle, so its area is the product of its length and its width. Find the area of each face that you see and then multiply each area by two to account for the face on the opposite side.
I have another total loan payment formula (see attached):
Total = rate * principal * # of payments / (1-((1 + rate)^-n))
Total = .005 * 15,000 * 60 / (1- ((1.005)^-60)
Total = 4,500 / (1 -0.7413721962)
Total = 4,500 / 0.2586278038
Total = 17,399.52
I know that is NOT one of the answers but I am sure of the formula and the calculations. I hope this helps.