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The quarterly returns for a group of 80 mutual funds with a mean of 3.7​% and...

The quarterly returns for a group of 80 mutual funds with a mean of 3.7​% and a standard deviation of 6.8​% can be modeled by a Normal model. Based on the model

​N(0.037,0.068), what are the cutoff values for the

​a) highest 40​% of these​ funds?

​b) lowest 30​%?

​c) middle 60​%?

​d) highest 70​%?

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