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Mathematics, 23.09.2019 10:30 1lilzomb

The quarterly returns for a group of 79 mutual funds with a mean of 1.1% and a standard deviation of 4.5% can be modeled by a normal model. based on the model n(0.011,0.045), what are the cutoff values for the:
a) highest 40% of these funds
b) lowest 20%?
c) middle 80%?
d) highest 80%?

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