This answer to this problem is c
C because when we write exponential growth equations we do a(1+r)^x. 3 percent is 0.03. 1+0.03 is 1.03. Only C has the growth rate what we want. You are welcome :)
Given : Sample size n=140, sample mean m = 105 and sample standard deviation s=9
We have to find 95% confidence interval for population mean which is given by
(m - Margin of error ) ≤ μ ≤ (m + Margin of error)
Where Margin of error is given by
Margin of error =![\frac{s*t}{\sqrt{n}}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bs%2At%7D%7B%5Csqrt%7Bn%7D%7D%20%20%20)
Where t = t critical value at alpha/2 level of significance and (n-1) degrees of freedom
Here alpha = 1- c = 1-0.95 = 0.05
degrees of freedom = n-1 = 140-1 = 139
Here we will use excel function to find t critical value which is
T.INV.2T(0.05, 139) = 1.977
The margin of error will be
ME = ![\frac{9 * 1.977}{\sqrt{140}}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%20%2A%201.977%7D%7B%5Csqrt%7B140%7D%7D%20%20%20)
ME = 1.5
The 95% confidence interval will become
(105 - 1.5 , 105 + 1.5)
(103.5, 106.5)
So the correct answer option is option C. (103.5, 106.5)
First of all 1+2=3 which leads to 6:3x=1 3x=6:1 3x=6 X=2
1. -2
2. 290
3. 0.8
4. -1
5. 9
6. -3.4
7. -68
8. 17
Hope this helps;)