Math Problem Solver

Original numbers in ascending order: $\frac{2}{3}$, $\frac{7}{10}$, $\frac{11}{15}$, $\frac{4}{5}$
Sum: $\frac{29}{10} \approx 2.9$
Mean: $\frac{29}{40} \approx 0.725$
Sample standard deviation: $\frac{\sqrt{105}}{180} \approx 0.0569$
Median: $\frac{43}{60} \approx 0.7167$
Mode: No mode