Tools and Toys

X has Standard Normal (Gaussian) distribution.
X has Student's t-distribution with degrees of freedom.
Probability that X does not exceed equals ??.
Probability that X does not exceed ?? equals .

Number of elements: .
Order statistic: .
Mean: .
Standard deviation (population): .
Standard deviation (sample): .
Proportion of elements with value less than or equal to equals ??.
Proportion of elements with value strictly less than ?? equals ??.