probability and hypothesis

Question 1

probability

definiton

Answer 1

numerical value of liklehood of events

Question 2

probability

equation

Answer 2

number of desired outcomes/ number of possible outcomes

Question 3

empirical probability

Answer 3

relative frequency of events, proportion of times outcome has occured ver repetitos. e,g how likely is footballer to score penalty if his track record is 25 out of 40

Question 4

sample space

definition

Answer 4

all possible outcomes

Question 5

hypothesis

part 1

Answer 5

state null hypothesis - no effect

Question 6

hypothesis

step 2

Answer 6

state alternate hypothesis

Question 7

directional/ one tailed hypothesis

Answer 7

listen to more music will make you happier

Question 8

non-directional/ two tailed hypothesis

Answer 8

music will have an effect on mood

Question 9

hypothesis

step 3

Answer 9

level of significance - 5%

Question 10

hypothesis

step 4

Answer 10

test statistic

Question 11

hypothesis

step 5

Answer 11

reject if critical value

Question 12

what can cause a sampling error

Answer 12

small sample size, poor sampling design

Question 13

type 1 error

Answer 13

false positive

Question 14

type 2 error

Answer 14

false negative

Question 15

z score

calculation

Answer 15

z = x - m/ sigma

Question 16

what is an acceptable z score

Answer 16

+1.96