Week 2 - Chapter 4 H.W.
Eighteen of the 100 digital video recorders (DVRs) in an inventory are known to be defective. What is the probability you randomly select an item that is not defective? 100 = sample space 100-18=82 82/100=.82
Answer: .82
What does Upper A overbarA denote?
Event Upper A overbarA denotes the complement of event A, meaning that Upper A overbarA consists of all outcomes in which event A does not occur.
Which of the following values cannot be probabilities? 0.05, −0.41, 11, 0, 3/5, 1.22, √2, 5/3
For any event A, the probability of A is between 0 and 1 inclusive. That is, 0≤P(A)≤1. First analyze 0.05. 0.05 could be the probability of an event because 0≤P(A)≤1, where P(A)=0.05. Now analyze −0.41. −0.41 could not be the probability of an event since negative 0.41 less than 0. using the same concepts as above, determine all the numbers that could be a probability of an event.
Unusual
Its unusual if its less then .05
The _______ for a procedure consists of all possible simple events or all outcomes that cannot be broken down any further.
Sample Space
As a procedure is repeated again and again, the relative frequency of an event tends to approach the actual probability. This is known as _______.
The law of large numbers
