xmp13.07 {Devore6} | R Documentation

## data from Example 13.6

### Description

The `xmp13.07` data frame has 16 rows and 2 columns on the yield of paddy (a grain farmed in India) versus the time of harvest.

### Format

This data frame contains the following columns:

days
  date of harvesting (number of days after flowering.
yield
  yield (kg/ha) of paddy

### Source

Devore, J. L. (2003) Probability and Statistics for Engineering and the Sciences (6th ed), Duxbury

(1975), ``Determination of biological maturity and effect of harvesting and drying conditions on milling quality of paddy'', J. Agricultural Eng. Research, 353-361

### Examples

    data(xmp13.07)
    plot(yield ~ days, data = xmp13.07,
       main = "Compare to Figure 13.11(a), page 579")
    fm1 <- lm(yield ~ days + I(days^2), data = xmp13.07)
    summary(fm1)
    anova(fm1)
    predict(fm1, list(days = 25), interval = "conf")
    predict(fm1, list(days = 25), interval = "pred")

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