5.2 terms

Question 1

random variable

Answer 1

typically represented by x that has a single numerical value, determined by chance for each outcome of a proceedure

Question 2

x

Answer 2

random variable

Question 3

probability distribution

Answer 3

a description that gives the P for each value of the random variable (x); often expressed in a table, formula or graph

Question 4

P

Answer 4

probability

Question 5

discreet random variable

Answer 5

has a value that is finite or countable

Question 6

continuous random variable

Answer 6

has infinitely many values and the collection of values is not countable

Question 7

expected value

Answer 7

the expected value of a discreet random variable x is denoted by E and it is the mean value of the outcome
mu = E

Question 8

formula for E

Answer 8

SUM[x*P(x)]

Question 9

mean

Answer 9

expected value

average

Question 10

mu

Answer 10

SUM[x*P(x)]

Question 11

range rule of thumb

Answer 11

the vast majority of values should like between 2 standard deviations plus or minus of the mean

Question 12

formula to calculate if within normal range?

Answer 12

minimum normal range = mu - 2sigma
maximum normal range = mu + 2sigma
OR
0.05