Image Processing and Neural Networks Intuition: Part 2

As you can see from the graph, a(sigmoid(x)) varies between 0 and 1. This makes sigmoid function and in turn logistic regression suitable for binomial classification problem. That means we can use logistic regression or sigmoid function when the target varible has only two values(0 or 1). This makes it suitable for our purpose, in which we are trying to predict the gender of the celebrity from images. Gender(our target variable) has only two values in our dataset, male(0) and female(1).