When using TF-IDF to represent a collection of n text documents as a dataframe using a vocabulary of m unique terms, what is the dimension of the resulting matrix? Question 8 Not yet answered Select one: Marked out of 1.00 O an + 2m - 1 P Flag question Ob n + m Ocn*m O d. n* (2m - 1) Question 9 To visualize the distribution of univariate categorical data, you would use a Not yet answered Marked out of 1.00 Select one: O a. histogram Flag question O b. line graph O c. bar chart O d. density plot Which of the following is true about test data? Question 10 Not yet answered Marked out of 1.00 Select one or more: a. it should be large enough to yield statistically meaningful results O b. it should have a distribution similar to the training data. It shouldn't have different characteristics compared to the training set. O c. it is used to evaluate a trained model Flag question O d. it should not be seen by the model prior to testing