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57000000
2006 Sep 15
2
prediction interval for new value
Hi,
1. How do I construct 95% prediction interval for new x values, for example - x = 30000?
2. How do I construct 95% confidence interval?
my dataframe is as follows :
>dt
structure(list(y = c(26100000,
60500000, 16200000, 30700000, 70100000, 57700000, 46700000, 8600000,
10000000, 61800000, 30200000, 52200000, 71900000, 55000000, 12700000
), x = c(108000, 136000, 35000,
77000, 178000, 150000, 126000, 24000, 28000, 214000, 108000,
190000, 308000, 252000, 71000)), .Names = c("y",
"x"), class = "data.frame", row.na...