[R] [Newbie] Is there any support for work with grouped frequencies?

[Matej Cepl]

Hi,

I have this table (BTW, published by FBI and representing age
distribution of the WTC tragedy victims):

	"LABEL" "FREQ" "MIDPOINT"
	"1" "Infant (under 1)"   0
	"2" "1 to 4"   5 
	"3" "5 to 8"   1
	"4" "9 to 12"   3
	"5" "13 to 16"   0
	"6" "17 to 19"   3
	"7" "20 to 24" 117
	"8" "25 to 29" 341
	"9" "30 to 34" 503
	"10" "35 to 39" 578
	"11" "40 to 44" 510
	"12" "45 to 49" 369
	"13" "50 to 54" 272
	"14" "55 to 59" 177
	"15" "60 to 64"  79
	"16" "65 to 69"  29
	"17" "70 to 74"  15
	"18" "75 and over"  11
	"19" "Unknown" NA

Are there any tools to work with grouped frequencies (i.e.,
median, mean, chi-square test of normality of distribution) or do
I have to calculate them ``by hand''?

Thanks for any answer,

	Matej

-- 
Matej Cepl, matej at ceplovi.cz,
Finger: 89EF 4BC6 288A BF43 1BAB  25C3 E09F EF25 D964 84AC
138 Highland Ave. #10, Somerville, Ma 02143, (617) 623-1488
 
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