Among all the income-tax forms filed in a certain year, the mean tax paid was $2000 and
Chapter 4, Problem 4(choose chapter or problem)
Among all the income-tax forms filed in a certain year, the mean tax paid was \(\$ 2000\) and the standard deviation was \(\$ 500\). In addition, for \(10 \%\) of the forms, the tax paid was greater than \(\$ 3000\). A random sample of 625 tax forms is drawn.
a. What is the probability that the average tax paid on the sample forms is greater than
\(\$ 1980\)?
b. What is the probability that more than 60 of the sampled forms have a tax of greater than
\(\$ 3000\)?
Equation Transcription:
Text Transcription:
$2000
$500
10%
$3000
$1980
$3000
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