STAT 211

= np / n =p If X~Binomial(n,p) then E(X)=np (Chapter 3) Example 2: A sample of 15 students who had taken calculus class yielded the following information on brand of calculator owned: T H C T H H C T T C C H S S S (T: Texas Instruments, H: Hewlett Packard, C=Casio, S=Sharp). ................
................