Stat 108: midterm 2

Question 1

probability

Answer 1

is a number in between 0 and 1 that reflects the likelihood of occurrence of the some event

Question 2

probability of an event

Answer 2

P(E)= number of favorable outcome /total # of outcome

Question 3

Probability Range

Answer 3

0<P(E)<1

Question 4

Disjoint Events

Answer 4

P(E and F)= 0

Question 5

Addition Rule

Answer 5

P(E or F) = P(E) + P(F) - P(E and F)
- the number that is added/counted twice

Question 6

Addition Rule (disjointed Events)

Answer 6

If E and F are disjoint, then P(E or F)=P(E) + P(F)

Question 7

multiplication rule for Independent Events

Answer 7

If events E and F are Independent then,P(E and F) = P(E)*P(F)

Question 8

standard normal distribution

Answer 8

a normal distribution w µ=0 and st dev=1

Question 9

margin of error

Answer 9

true value of statistics within the bound

Question 10

parameters

Answer 10

numerical characteristic of a population, as distinct from a statistic of a sample-> it never changes

Question 11

p

Answer 11

population parameter

Question 12

p ˄

Answer 12

sample proportion