The following data set that shows the median household income for 20 U.S. states:

$49,781

$49,973

$54,555

$54,555

$55,821

$58,663

$58,728

$59,892

$60,449

$63,938

$65,012

$68,718

$70,145

$70,489

$72,812

$73,034

$80,108

$85,750

$86,223

$86,345

1. Calculate the mean $
2. Calculate the mode $
3. Calculate the standard deviation of the largest four values, round your answer to the nearest cent.
4. Calculate the five number summary:

min =

Q1 =

median =

Q3 =

max =

5.Calculate the inter-quartile range:

IQR = $