<span>If Ashton made
contributions to a Roth IRA over the course of 32 working years, then his
contributions averaged $2,400 annually, and Ashton was in the 28% tax bracket
during his working years, then the annual compounding will be 6% or .06.</span>
Plug in the first into second for x and use distribution function and solve, this will be answer.
Solution:
Let
X = height of Cody on the first day of school last year
Given:
Y= height of Cody on the first day of school year = 165 cm
10%(X)+X=Y
.10(X)+X=165
1.10X=165
X=165/1.1
<span>X=
150 cm = height of Cody on the first day of school last year</span>
Cohen's d is calculated according to the formula:
d = (mean difference) / standard deviation
0.5 = mean difference / 12
Therefore, mean difference = 6
Since we have a population mean of 80, the sample mean must be 80 + 6 = 86.
