Biostats lesson 3

Question 1

Measure of the likelihood of an event happening
Measures the certainty of an event
Has a minimum value of 0 or 0% pertaining to an impossible event, and a maxiumum value of 1 or 100% pertaining to a sure event

Answer 1

Probability

Question 2

It is denoted by P(A)

Answer 2

Probability

Question 3

Result of an observation/experiment, or the descriptor or some potential outcome
Subset of the set of all possibile outcomes of a probabilistic experiment

Answer 3

Event:R

Question 4

Represented by uppercase lettters: A,B, C

Answer 4

Event

Question 5

Collection of al the possible outcome in a random experiment
Denoted by omega

Answer 5

Sample Space

Question 6

2 types of sample space

Answer 6

Finite sample space
Infinite sample space

Question 7

Sample space with a definite no. of sample points
Eg. tossing a coin, rolling a dice

Answer 7

Finite Sample Space

Question 8

Sample space with no definite no. of sample space
orders per day, measuring weight

Answer 8

Infinite sample space

Question 9

Event that can never occur
Has a probability of zero 0, whereas most events have probabilities between the value of 0 and 1

Answer 9

null event

Question 10

When 2 events are mutually exclusive, the additive rule of probability states that the probability that either of the 2 events will occus is equal to the sum of the probabilities of the indv events

Answer 10

Additive Rule of Probability

Question 11

The insertion of 2 events read as” Both A and B” which means that both events much be met for it to count as 1 value

If either A and B are not fulfilled, this event, this intersection is not counted/valued for

Answer 11

Intersection

Question 12

The conjunction “___” is the keyword for intersection

Answer 12

and

Question 13

Read as: “Either A or B, or both A and B” which mens that fulfillment of only A, only B, or both A and B is accounted for

Answer 13

Union

Question 14

The occurence that any of these events may happen in the random experiment

Answer 14

Union

Question 15

The conjunction “___” is the keyword for union

Answer 15

or

Question 16

Read as: “Not A” which means that the non-fulfillment or the converse/opposite event of A is the trigger for this operation

Would list the sample points inn the sample space that are not part of the event

Answer 16

Complement

Question 17

The area between the rectangle box represents all the outcomes called _____

Answer 17

sample space

Question 18

What is P(A)

Answer 18

Probability of even A

Question 19

Expressed as P(A|B) wherein the probability of event A is influenced by the existence of event B

Answer 19

Conditional Probability

Question 20

States that the probability that two events A and B will both occur is equal to the probability of B multiplied by the conditional probability of A given that B has already occured

Answer 20

Multiplicative Rule of Probability

Question 21

A fundamental rule relating marginal probabilities to conditional probabilities

Answer 21

Total Probability

Question 22

Total probability of an outcome which can be realized via several distinct ecents

Answer 22

Total Probability

Question 23

Set of events that all amount to the sum of 1

Answer 23

Exhaustive

Question 24

The multiplicative rule of probability states that the probability that two events A and B will both occur is equal to the probability of B multiplied by the conditional probability of A given that B has already occured

Answer 24

Total Probability Rule

Question 25

A function wherein you want to compare the probability of occurence of an event between two groups

Answer 25

Relative Risk(RR)

Question 26

If an event takes place with probability p, then the odds in favor of the event are the probability that the event will occur divided by the probability the event will not occur or p/(1-p) to 1

Answer 26

Odds Ratio