Unit 5 24 AnswerYouTube↗  IA↗(long shot)
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This one is easy to calculate for SPAM and HAM.
スパムとハムの確率は簡単です
For SPAM, it's 2/5, and the reason is, we had previously
スパムの確率は2／5です
3 out of 8 messages assigned to SPAM.
8件のメッセージ中スパムは3件でしたね
But thanks to the Laplacian smoother, we add 1 over here.
ラプラススムージングによって分子に1を足し
And there are 2 classes, so we add 2 times 1 over here,
2分類あるので分母に2×1を足して
which gives us 4/10, which is 2/5.
4／10または2／5となります
Similarly to get 3/5 over here.
同様にハムの確率は3／5です
Now the tricky part comes up over here.
次は少し複雑です
Before, we had 0 occurances of the word "today" in the SPAM class,
スパムにおいてTODAYは0回の出現で
and we had 9 data points.
データは9個ありました
But now we are going to add 1 for Laplacian smoother,
ここにラプラススムージングで1を加え
and down here, we are going to add 12.
分母には12を加えます
And the reason that we add 12 is because there's 12 different words in our dictionary
なぜなら単語辞書に 単語が12個含まれているからです
Hence, for each word in the dictonary, we are going to add 1. So we have a total of 12, which gives us the 12 over here.
単語ごとに1を加えるので合計12になります
That makes 1/21.
答えは1／21になります
In the HAM class, we had 2 occurrences of the word "today"--over here and over here.
ハムではTODAYは2回現れています
We add 1, normalize by 15, plus 12 for the dictionary size,
分子には1を加えて 分母には15に辞書の単語数の12を加えます
which is 3/27 or 1/9.
答えは3／27つまり1／9となります
This was not an easy question.
少し難しかったですね
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