Question 1 Foundation
State the four conditions for a binomial model.
Answer. Fixed ; two outcomes per trial; constant ; independent trials.
All four are required. Sampling without replacement typically breaks the last two at once.
Original questions written at exam standard. Work each one before you open the solution.
Answer. Fixed ; two outcomes per trial; constant ; independent trials.
All four are required. Sampling without replacement typically breaks the last two at once.
Answer.
. Ten trials at a 30% rate should give about 3 successes.
Answer.
. When every outcome has the same power of a half.
Answer.
, so the standard deviation is 1.45.
Answer.
, so .
Answer. The probability of success changes between draws, so is not constant.
Removing a card alters the composition of the deck, which breaks both the constant- and the independence conditions.