February 27, 2017

Homework Help: Statistics

Posted by Stuart on Sunday, February 22, 2009 at 4:06pm.

In 2020, the average charge of tax preparation was $95. Assuming a normal distribution and a standard deviation of $10, use the approximate areas beneath the normal curve, as discussed in this section, to answer the following questions.

What proportion of tax preparation fees were between $75 and $115?

A) 0.84

B) 0.34

C) 0.955

D) 0.75

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