What is a critical value? What is Z_(a/2)? Question from pg 322

Because ___ is rarely known, the confidence interval estimates of ____ almost _____ use the t distribution instead of the normal distribution

The mean age of Taxi drivers in Miami is greater than 78.9 years. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis?

What is the z value of question 3?

A Reuters poll of 1007 randomly selected adults show that 93% of them know twitter. Find the margin of Error, E, with 90%  CL                 E = ( Z alpha/2)  (Sqrt ( pq/n))

When estimating population mean with σ (sigma) not known. You follow two requirements

You roll a die. Find the probability of rolling a number less than 3 or rolling an odd number.

What are the requirement checks for question #3? (Normal Distribution as approximate to the Binomial Distribution)

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.

Pew Research revealed 92% of adults know twitter. 5 adults were randomly chosen. What is the probability Exactly 3 adults know twitter. Note: 5C3 means 5 combination 3 where order is not important