Exam 6: Probability

If the observations are so different from the expected result of a study that the difference cannot be due to chance,then you should reject the _____.

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 If a baby was randomly selected from those participating in the study,the likelihood of that baby having dark eyes is ____.

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 values entered within the table (that is,1,6,19,15,13,24)are called ____.

In a horse race,people are allowed to bet on which horses will finish a race in positions 1,2,or 3.If the field contained 7 horses,how many ways can 3 horses finish in the three positions?

If the probability of an experimental outcome that we observed was calculated to be less than .05 assuming the null hypothesis to be true,then we would ____.

If the p(A)= p(A/B),then the two events are independent.

The binomial and normal distributions are closely related,with the correspondence between them depending on the values of:

For small n,the correction for _____ yields even better correspondence between the binomial and normal distributions.

In general notation,the probability of observing at least one of event A and event B is:

A marketing researcher at a computer company did a study examining user satisfaction with two operating systems.A total of 300 users were surveyed on the type of operating system used and their satisfaction with it.Use the following data set to answer questions 6-14: What is the probability that a person uses system 10?

The concept of probability forms the foundation of inferential statistics as well as several descriptive statistical methods.

Let event A be "satisfied with one's marriage" and event B be "satisfied with one's job.The probability that someone is satisfied with both his marriage and his job is equal to:

If the probability of event A is .40 and the probability of event B is .35,what is the probability that event A or B will occur,if A and B are independent?

What is the relationship between the binomial distribution and the normal distribution?

Determining what constitutes chance versus non-chance results under the assumption that the null hypothesis is true is done with reference to a probability value known as a(n):

If we randomly select an individual from a population consisting of 60 males and 40 females,the probability of selecting a male is 60/100 = .60.

What is a conditional probability?

You have conducted a study using a therapy technique to reduce depression.Out of 10 clients,you found a reduction for 6 of them.Can we conclude that the therapy technique works?

In probability theory,when two outcomes cannot occur simultaneously they are ____.

If a researcher does the following calculation, (4)(3)(2)(1)= 24,this researcher is calculating the ____________________ of the number 4.