what is the probability that school A sample proportion is more than 5% higher than school B's stats with hogan

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

According to the data set, where should the upper quartile line of the box plot be placed?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?