Worksheet 2 (1).pdf - Psychological data analysis Central...

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Psychological data analysis Central tendency, variability and relative position of a score Week 4 Individual task worksheet 2 Task 1 The following table contains data on mean and median US income across time. The 2006 dollars are adjusted for inflation, and therefore more meaningful. What can you infer about the shape of the income distribution? What time trends can you identify? This task does not require SPSS. Region and year Number (thous.) Median Income Mean Income Current dollars 2006 dollars Current dollars 2006 dollars United States 2006 116,011 48,201 48,201 66,570 66,570 2005 114,384 46,326 47,845 63,344 65,421 2004 113,343 44,334 47,323 60,466 64,542 2003 112,000 43,318 47,488 59,067 64,753 2002 111,278 42,409 47,530 57,852 64,837 2001 109,297 42,228 48,091 58,208 66,290 2000 108,209 41,990 49,163 57,135 66,895 1999 106,434 40,696 49,244 54,737 66,235 1998 103,874 38,885 48,034 51,855 64,056 1997 102,528 37,005 46,350 49,692 62,241 1996 101,018 35,492 45,416 47,123 60,299 1995 99,627 34,076 44,764 44,938 59,033 1994 98,990 32,264 43,405 43,133 58,027 1993 97,107 31,241 42,926 41,428 56,923 1992 96,426 30,636 43,135 38,840 54,686 1991 95,669 30,126 43,492 37,922 54,747 1990 94,312 29,943 44,778 37,403 55,934 1989 93,347 28,906 45,382 36,520 57,336 1988 92,830 27,225 44,587 34,017 55,710 1987 91,124 26,061 44,247 32,410 55,026 1986 89,479 24,897 43,699 30,759 53,988 1985 88,458 23,618 42,205 29,066 51,940 1984 86,789 22,415 41,430 27,464 50,762 1983 85,407 20,885 40,182 25,401 48,871 1982 83,918 20,171 40,465 24,309 48,766
1981 83,527 19,074 40,573 22,787 48,471 1980 82,368 17,710 41,258 21,063 49,070 1979 80,776 16,461 42,606 19,554 50,611 1978 77,330 15,064 42,725 17,730 50,286 1977 76,030 13,572 40,187 16,100 47,672 1976 74,142 12,686 39,961 14,922 47,004 1975 72,867 11,800 39,302 13,779 45,894 Data retrieved from: United States Census Bureau (2008, retrieved 2015). (Households as of

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