exercises for 25-27 September_澳门葡京手机版app下载

nils
2023-09-20T13:29:05.744Z
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www.uio.no

1. We're rounding off Ch2 and will start Ch3 on 25-27 September.

2. On Mon 25 Sept we carry out the "Nils leaves the room during the break" exercise; Berit and Oskar take notes and speak with Nils a bit later on, about aspects of the course.

3. For 25-27 Sept, first do Story IV. I've placed birthweight-boys and birthweight-girls on the website, read these into your computers. As part of the exercise, make confidence plots for boys and girls, as a function of q from say 0.05 to 0.95, with (i) estimated quantiles and (ii) a 95% band. This involves estimating the variances q(1-q)/f(quantile(q)), for boys and girls. You may use "density" in R (without caring so much about which formulae are under the hood), e.g. using

fhatBval[j] <- mean( density(yyB,from=QBval[j],to=QBval[j])$y )

fhatGval[j] <- mean( density(yyG,from=QGval[j],to=QGval[j])$y )

(There might be simpler ways, but at least this works.) ...