SOLUTION: International mutual funds reported weak returns in 2008. The population of international mutual funds earned a mean return of -43.95% in 2008. Assume that the returns for inte

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Question 667885: International mutual funds reported weak returns in 2008. The population
of international mutual funds earned a mean return of -43.95% in 2008.
Assume that the returns for international mutual funds were distributed as
a normal random variable, with a mean of -43.95 and a standard deviation
of 20. If you selected a random sample of 10 funds from this population,
what is the probability that the sample would have a mean return
a less than -10
b between 0 and -20
c greater than -30
Found 2 solutions by ithedocktai, jimmy3105:
Answer by ithedocktai(1) About Me  (Show Source):
Answer by jimmy3105(1) About Me  (Show Source):
You can put this solution on YOUR website!
c greater than -30
Population Variance = Z
Population Standard Deviation = S = 1/Z
Z = ( X - μ ) / σ
S=1/Z
1/10 = {X – (-43.95%)} / 20
20/10 = X+43.95%
2 – 43.95% = X
X = -41.95%
i hope this is the answer of the question required thank you...