SOLUTION: Solve formula for variable – Statistics Example The formula for the margin for the margin of error to establish a confidence interval has been found mathematically to be: w

Algebra ->  Algebra  -> Polynomials-and-rational-expressions -> SOLUTION: Solve formula for variable – Statistics Example The formula for the margin for the margin of error to establish a confidence interval has been found mathematically to be: w      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 40844: Solve formula for variable – Statistics Example
The formula for the margin for the margin of error to establish a confidence interval has been
found mathematically to be:
where:
e = margin of error
z = critical value
s = sample standard deviation
n = sample size
Given known values for e, z, and s solve the margin of error formula n to determine sample size.
⇒ ⇒ ⇒ ⇒ ⇒

Answer by stanbon(48569) About Me  (Show Source):
You can put this solution on YOUR website!
There are different margin of error formulas relating
to different population parameters.
If you are talking about the margin associated with
estimating the mean of a population
the margin of error is E=z(star)[s/sqrt(n)]
Solve this equation for n as follows:
sqrt(n)= z(star)[s/E]
Square both sides to get:

n=[z(star)s/E]^2
Cheers,
Stan H.