MIS support systems rely on models for computational and analytical routines that mathematically express relationships among variables

A bank manager wants to determine the percent of time the bank's tellers are working and idle. He decides to use work sampling, and his initial estimate is that the tellers are idle 20% of the time

Approximately how many observations should be taken to be 95% confident that the results will not be more than 5% away from the true result? A) 6 B) 16 C) 44 D) 210 E) 246

A symmetric encryption scheme has five ingredients: plaintext, encryption algorithm, ciphertext, decryption algorithm and _________

What will be an ideal response?