Exam 6: Probability

If events A and B are independent,then ____.

A therapist claims that a particular technique has been successful in the treatment of eating disorders.You find out that only 7 out of 10 clients were actually helped.What is the probability of observing 7 successes if the probability of success = .5?

Two outcomes are said to be _____ if it is impossible for both outcomes to occur simultaneously for a given individual.

In factorial notation,the expression 3! = (3)(2)(1)= 6.

Each unique combination of variables in a contingency table is referred to as a:

Suppose you wanted a rat to learn a maze which included 3 choice points and each choice included 3 different directions.Assume only 1 choice can be correct at a time.What is the probability of a rat finding the goal without any errors?

In general,the probability of observing at least one of event A and event B is p(A or B)= p(A)+ p(B)- p(A,B).

The likelihood of each of two events occurring refers to a ____________________ probability.

A researcher wanted to compare eye color distributions of babies born with a birth defect with babies who did not have the birth defect.26 babies with the defect were matched on gender,race,and age with 52 babies without the defect.The frequency of different eye colors as a function of the presence or absence of the defects was as follows: Eye Color Group Dark Medium Light Defect 1 6 19 No Defect 15 13 24 The marginal frequencies for eye color are

In the context of probability theory,there is no difference between sampling with replacement and sampling without replacement.

A conditional probability indicates the likelihood that an event will occur given that some other event occurs.

A new drug developed to fight depression has a .20 probability of causing dizziness.A person takes the drug 100 times. What is the probability of the person getting dizzy 10 times or fewer?

The correspondence between the ____________________ and normal distributions improves as p gets closer to .500.

Distinguish between sampling with replacement versus sampling without replacement.

In counting rules,permutations take into account the order of objects,while combinations do not.

Using the example of a coin flip,distinguish between a trial and an event.

Using the binomial expression to compute a probability requires ____.

A sample of 500 people aged 30 - 40 years old were interviewed to study the relationship between whether a person graduated from college or only high school and whether s/he changed jobs in the last 5 years.The results are found in the contingency table below. Answers below have been rounded to two decimal places. What is the probability that an individual has changed jobs and they have graduated from college?

A researcher wanted to compare eye color distributions of babies born with a birth defect with babies who did not have the birth defect.26 babies with the defect were matched on gender,race,and age with 52 babies without the defect.The frequency of different eye colors as a function of the presence or absence of the defects was as follows: Eye Color Group Dark Medium Light Defect 1 6 19 No Defect 15 13 24 The probability of the number of observations favoring both events A and B,divided by the total number of observations,is called a ____ probability.

Assuming the null hypothesis is true,we can specify an _____ of an investigation.