Home » Data Science » Machine Learning » Let’s see why F1 is used instead of the regular mean of precision and recall. Let’s say the mean of precision and recall is at least 0.75. Which of the following could be the true value of the precision? Q: Practice More Questions From: Information Extraction with NLP Created with Fabric.js 4.6.0 Practice More Questions Data Analysis 2000+ Qs Machine Learning 1000+ Qs Created with Fabric.js 4.6.0 Similar Questions Now let’s say F1 score is at least 0.75. Now which of the following values of precision are possible? You are working with the penguins dataset. You want to use the summarize() and mean() functions to find the mean value for the variable body_mass_g. You write the following code:penguins…Let’s say blood pressure (BP) measurements are more likely to be missing among young people, who generally have lower blood pressure. You use mean imputation to train your model. Which option…You want to apply the filter() function to the variables Cocoa.Percent and Rating. Add the code chunk that lets you filter the data frame for chocolate bars that contain at least 75% cocoa and have a…Tableau is used to create interactive and dynamic visualizations. A visualization is interactive when the audience can control what data they see. What does it mean for a visualization to be…You want to use the summarize() and mean() functions to find the mean rating for your data. Add the code chunk that lets you find the mean value for the variable Rating. What is the mean rating?For every specificity, as we vary the threshold, the sensitivity of model 1 is at least as high as model 2. Which of the following must be true?Let f(x) be the probability that a person with feature x dies within 5 years. Let Sx(t) be the survival function of a person with feature x. Assume t is measured in years. Which of the following is…A data analyst is working with a dataset in R that has more than 50,000 observations. Why might they choose to use a tibble instead of the standard data frame? Select all that apply.Let’s say you have a relatively small training set (~5 thousand images). Which training strategy makes the most sense? Now let’s say you have a very large dataset (~1 million images). Which training strategies will make the most sense?A data analyst writes the following code chunk to return a statistical summary of their dataset: quartet %>% group_by(set) %>% summarize(mean(x), sd(x), mean(y), sd(y), cor(x, y)) Which function will…A data analyst is working with a data frame named retail. It has separate columns for dollars (price_dollars) and cents (price_cents). The analyst wants to combine the two columns into a single column…Fill in the blank: When using Tableau, people can control what data they see in a visualization. This is an example of Tableau being _____.The _____ aesthetic makes some points on a plot more transparent, or see-through, than others. Created with Fabric.js 4.6.0 Practice More Questions Data Analysis 200+ Qs Machine Learning 100+ Qs
