From 459374677498583cada5ee0131e9c1f15d54d3ce Mon Sep 17 00:00:00 2001 From: the-REAL-beautysleep Date: Fri, 16 Sep 2022 13:16:26 +0100 Subject: [PATCH] changed P(Y) to P(Y_i) in the final row of a probability model table. I tried calculating probability models based on P(Y) in the final row in the practice excercise 3.31 and it doesn't line up with the answer provided however, doing so using P(y_i) matches the provided solution so I think this was a typo. --- ch_probability/TeX/ch_probability.tex | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ch_probability/TeX/ch_probability.tex b/ch_probability/TeX/ch_probability.tex index 8d092130..0b7483b4 100644 --- a/ch_probability/TeX/ch_probability.tex +++ b/ch_probability/TeX/ch_probability.tex @@ -1914,7 +1914,7 @@ \subsection{Variability in random variables} $y_i\times P(Y=y_i)$ & 0.00 & 39.75 & 120.00 & $E(Y) = 159.75$\\ $y_i-E(Y)$ & -159.75 & -0.75 & 40.25 & \\ $(y_i-E(Y))^2$ & 25520.06 & 0.56 & 1620.06 & \\ -$(y_i-E(Y))^2\times P(Y)$ & 3828.0 & 0.1 & 972.0 & $Var(Y) \approx 4800$ \\ +$(y_i-E(Y))^2\times P(Y=y_i)$ & 3828.0 & 0.1 & 972.0 & $Var(Y) \approx 4800$ \\ \hline \end{tabular} \end{center}}