I am trying to understand why my data is not showing a full S-curve? Is it because the predictor does not do a good job of predicting fellow = 1, or simply because there are few fellow = 1 that score within the top end on c_ns2 (x-axis variable)?
[![enter image description here][2]][2]
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when attempting to extend x-xis to range from 2.5--7:
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ggplot(graph_df, aes(c_ns2, fellow)) +
geom_point() +
geom_smooth(method = 'glm', method.args = list(family = "binomial"), se = FALSE, size = 2, colour = "lightblue") +
theme_classic() +
geom_hline(yintercept = 0.5, colour = "grey50", linetype = 2, size = 1) +
xlim(c(2.5, 7))