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Use the median and quartiles instead.

Make sure the random plot matches the language in the narrative.

This matches John Tukey's language in Exploratory Data Analysis (1977).

Remark 5.1. Note that although we say X is 3.5 on the average, we must keep in mind that our X
never actually equals 3.5 (in fact, it is impossible for X to equal 3.5).

should be

Remark 5.1. Note that although we say X is 1.5 on the average, we must keep in mind that our X
never actually equals 1.5 (in fact, it is impossible for X to equal 1.5).

Hello,
I noticed that IPSUR is noticeably more recent on github than on the R repository. I would like to use the newer one but I'm a pure beginner and unfortunately don't know how to install it from github. Could you please write a short install explanation ?

thanks a lot

Example 4.26 says:

(11 * 10 * 9) * (7 * 6 * 5 * 4) * 313
[1] 260290800
or alternatively
prod(9:11) * prod(4:7) * 313
[1] 260290800
or even
prod(factorial(c(11, 7))/factorial(c(8, 3))) * 313
[1] 260290800

It should say:

(11 * 10 * 9) * (7 * 6 * 5 * 4) * 31^3
[1] 24774195600
or alternatively
prod(9:11) * prod(4:7) * 31^3
[1] 24774195600
or even
prod(factorial(c(11, 7))/factorial(c(8, 3))) * 31^3
[1] 24774195600

Figure 11.1.1 (Philosophical foundations of SLR) did not come out and leads to a broken link in section 11.1.1. pg. 227 (IPSUR, 2nd edition June 6, 2014)

The relevant code is in IPSUR.org lines 13543. Unfortunately, I do not know org-mode so I do not know where the mistake may be (the R code works)

https://github.com/gjkerns/IPSUR/blob/master/IPSUR.org#L13643

Original text:

What is the probability of observing "red", then "green", then "red"?

prob(N, isin(N, c("red", "green", "red"), ordered = TRUE))
[1] 0.175
Note that the exact value is 7/20 (do it with the Multiplication Rule).

Should say:

What is the probability of observing "red", then "green", then "red"?

prob(N, isin(N, c("red", "green", "red"), ordered = TRUE))
[1] 0.175
Note that the exact value is 7/40 (do it with the Multiplication Rule).

Justification: (7/10)(3/9)(6/8)=126/720=7/40=.175