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(b) Create a histogram and normal quantile plot for the height changes of the seedlings. Is the distribution<br />
approximately normal<br />
# Using base graphs<br />
hist(BS$Ht.change, main = "Histogram", xlab = "", freq = FALSE, col = "pink")<br />
lines(density(BS$Ht.change), col = "red", lwd = 2)<br />
curve(dnorm(x, mean(BS$Ht.change), sd(BS$Ht.change)), 0, 60, add = TRUE, col = "blue",<br />
lwd = 2)<br />
Histogram<br />
Density<br />
0.00 0.02 0.04<br />
10 20 30 40 50<br />
qqnorm(BS$Ht.change, col = "red")<br />
qqline(BS$Ht.change, col = "blue")<br />
Normal Q-Q Plot<br />
Sample Quantiles<br />
10 20 30 40 50<br />
-2 -1 0 1 2<br />
Theoretical Quantiles<br />
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