Simulation
This page performs a simulation to illustrate the theoretical distribution of the difference between two sample means.
Irrespective of the distributions within the two
groups,
Click Accumulate then take several samples.
To test the manipulative skill of job applicants, they are sometimes given a 'one-hole test' in which they grasp a pin, move it to a hole, insert it, and return for another pin. The test score is the number of pins inserted in a fixed time interval. A large study was undertaken comparing male college students with experienced female industrial workers. The table below describes the number of pins inserted in one minute.
Group | n | mean | s |
---|---|---|---|
Male college students | 750 | 35.12 | 4.31 |
Experienced female industrial workers | 412 | 37.32 | 3.83 |
The simulation uses these means and standard deviations as population parameters.