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Pew Research revealed 92% of adults know twitter. 5 adults were randomly chosen. What is the probability the first three consecutive adults know twitter.

A sample of size n= 18 is a simple random sample selected from normal distribution population. Find the Critical Value t_(a/2) corresponding to 99% CL. Use the t table.

You select a card from a standard deck of 52 playing cards. Find the probability that the card is 4 or an ace. Keep in mind that there are 4 fours and 4 ace’s in a deck of 52 cards. P( 4 or Ace) =

When do you choose z distribution?

When three children are born: Assuming that boys and girls are equally likely, find the probability of getting three children of all the same gender P (Three children having the same gender) =  

The basic multiplication rule is used for finding P(A and B), the probability that event A occurs in a first trial and event B occurs in a second trial. If the outcome of the first event A somehow affects the probability of the second event B, it is important to ___________the probability of B to reflect the ____________ of event A.

A student decided not to study for his Statistics test consisting of 12 questions. He said I will probably do well, since its multiple choice and I have ¼ chance of getting the answer right. Without reading the test he decides to bubble in at random. What is the probability he gets all of the questions right? The first 10 right? 4 right? To the problem above you need to do:

In general, the probability of any sequence of independent events is simply: The _________ of their corresponding probabilities

P (A or B) = P(A) + P(B) P(A and B) also known as Formal Addition Rule: where P (A and B) denotes the probability that A and B ____ occur at the _______ as an outcome in a trial of a procedure.

Events A and B are _______(or mutually exclusive) if they cannot occur at the _____time. (That is, disjoint events do not_______.)