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ml-recall

#trigram

1 question from Language Modeling

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Question 1: Short answer

easyAI-checkedLanguage Modeling

An interpolated trigram model combines P^(wn∣wn−2,wn−1)=λ1P(wn∣wn−2,wn−1)+λ2P(wn∣wn−1)+λ3P(wn)\hat{P}(w_n \mid w_{n-2}, w_{n-1}) = \lambda_1 P(w_n \mid w_{n-2}, w_{n-1}) + \lambda_2 P(w_n \mid w_{n-1}) + \lambda_3 P(w_n) with λ1=0.5\lambda_1 = 0.5, λ2=0.3\lambda_2 = 0.3, λ3=0.2\lambda_3 = 0.2. The trigram, bigram and unigram estimates for a word are 0.4, 0.2 and 0.05. What is the interpolated probability?

a probability, 2 decimals