Looking at the data, we see that two outliers (age 30 with 10 employees, age 33 with 12 employees) are driving what is admittedly a "small" correlation. These two companies are about 4 standard deviations away from the mean of 1.4 employees/company.
They're arguably outliers, and I suspect they're skewing any effect we might be seeing.
Of course, a small, skewed sample (tech companies in YC) obviously means we can't infer a damn thing beyond YC members to begin with, but its worth pointing out those outliers.
Let's not rush to find an explanation, now!
Looking at the data, we see that two outliers (age 30 with 10 employees, age 33 with 12 employees) are driving what is admittedly a "small" correlation. These two companies are about 4 standard deviations away from the mean of 1.4 employees/company.
They're arguably outliers, and I suspect they're skewing any effect we might be seeing.
Of course, a small, skewed sample (tech companies in YC) obviously means we can't infer a damn thing beyond YC members to begin with, but its worth pointing out those outliers.