/* basic-stats.c */
int main(int argc, char *argv[]);
void usage(char *argv[]);
int print_z_table(void);
int print_z_score(int argc, char *argv[]);
int print_normal_cdf(int argc, char *argv[]);
int print_t_table(void);
int print_t_score(int argc, char *argv[]);
int print_t_cdf(int argc, char *argv[]);
