stats year 1 definitions

Question 1

experiment

Answer 1

a repeatable process that gives rise to a number of outcomes

Question 2

event

Answer 2

a collection of one of more outcomes

Question 3

sample space

Answer 3

the set of all possible outcomes

Question 4

mutually exclusive events

Answer 4

P(A u B) = P(A) + P(A)

Question 5

critical region

Answer 5

if the test statistic falls into this, you reject the null hypothesis

Question 6

critical value

Answer 6

the first region to fall into the critical region

Question 7

actual significance level

Answer 7

the probability of incorrectly rejecting the null hypothesis

Question 8

test statistic

Answer 8

the result of the experiment or the statistic that is calculated

Question 9

hypothesis test

Answer 9

using a sample or an experiment to determine whether or not to reject the null hypothesis

Question 10

critical value

Answer 10

the first value to fall inside the critical region

Question 11

acceptance region

Answer 11

values in this region mean we have to accept the null hypothesis

Question 12

population

Answer 12

set of all the items in interest

Question 13

sample

Answer 13

subset of the population, designed to represent the whole population

Question 14

census

Answer 14

measures the whole population

Question 15

sampling unit

Answer 15

single units of the population