Chapter 5-7 Study Guide

The probability of rolling a 3 or 2 on a single die is an example of conditional probability.

False. (it is classical probability)

12. The normal distribution can be used to approximate a binomial distribution when np is less than 5

False. It needs to be greater than 5

To construct a binomial probability distribution, the mean must be known.

Falseish. You need the number of trails and probability of successes

A joint probability measures the likelihood that two or more events will happen concurrently.

True

An illustration of an experiment is turning the ignition key of an automobile as it comes off the assembly to determine whether or not the engine will store

True

Bayes' theorem is a method to revise the probability of an event given additional information

True

The mean of a probability is called its expected value

True

When sampling is done without replacement and the outcomes are measure as either success or failure, the hyper geometric distribution should be applied.

True

what happens to the shape of a binomial distribution as the number of trials increases

bell shaped, symmetrical

for normally distributed random variables, what rule makes probability statements based on specific values for the standard deviation?

empirical rule

For a uniform probability distribution, the probability of any event is equal to 1/(b-a).

false

The z-scores for X values greater than the mean are negative.

false they are positive

The area under the normal curve within plus and minus one standard deviation of the mean is about 68.26%.

true

The variance of a binomial distribution is found by npi(1-pi)

true