Chapter 8 Review

Front

What is the probability of getting exactly 6 questions correct on a 10-question multiple choice test with 5 choices each, when guessing?

Back

0.6%.

Front

What is the probability that neither of two patients will be successfully cured if a medical treatment has a success rate of 0.8?

Back

0.04.

Front

How many ways can 15 contestants come in first, second, and third place in a competition?

Back

2730.

Front

If 38% of Americans are planning to vote for Barack Obama, how many out of a random sample of 100 people would you expect to vote for him?

Back

38 people.

Front

What is the probability that at least 2 out of the first 10 blood donors has Type B blood if 11% of the U.S. population has Type B blood?

Back

0.303.

Front

Define probability in the context of a random experiment.

Back

Probability is the measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the formula for calculating the probability of an event?

Back

P(E) = Number of favorable outcomes / Total number of outcomes.

Front

Explain the concept of independent events in probability.

Back

Independent events are events where the outcome of one event does not affect the outcome of another.

Front

What is a binomial probability distribution?

Back

A binomial probability distribution models the number of successes in a fixed number of independent Bernoulli trials.

Front

What is the formula for the binomial probability?

Back

P(X = k) = (n choose k) * p^k * (1-p)^(n-k), where n is the number of trials, k is the number of successes, and p is the probability of success.