MODULE 5 - PROBABILITY

Question 1

what is a random trial?

Answer 1

Any process that has multiple outcomes but where the result on any particular trial is unknown

Question 2

what is a sample space?

Answer 2

the set of all possible outcomes from a random trial

Question 3

what is an event?

Answer 3

Any subset of the sample space

Question 4

what is probability distributions?

Answer 4

Functions that describe probability over a range of events

Question 5

3 properties of probability distributions

Answer 5

1. They describe the probability for the entire sample space
2. The area under the probability distribution always sums to one
3. Are used to describe both continuous and discrete random variables.

Question 6

what are discrete distributions?

Answer 6

probability distribution for a discrete variable

Question 7

what are continuous distributions?

Answer 7

Probability distribution for a continuous variable

if the range is 0 then the probability is 0

Question 8

what is standard normal distribution?

Answer 8

is a special form of the Normal distribution with mean zero and a standard deviation of one

Question 9

converting to a standard normal distribution

Answer 9

1. subtract the mean
2. divide by the standard deviation