Year 1 Stats

Question 1

What is the process of removing anomalies from data called

Answer 1

Cleaning the data

Question 2

Whats the equation for area of a bar

Answer 2

Frequency density x width

Question 3

What is bivariate data

Answer 3

It is data which has pairs of values for two variables

Question 4

What is correlation

Answer 4

It describes the nature of the linear relationship between 2 variables

Question 5

What means data is mutually exclusive

Answer 5

P(AuB) = P(A) + P(B)

Question 6

What means data is independant

Answer 6

P(AnB) = P(A) x P(B)

Question 7

What is a null hypothesis

Answer 7

The hypothesis that you assume to be correct

Question 8

What is the alternative hypothesis

Answer 8

The right hypothesis if your assumption is wrong

Question 9

What is a critical region

Answer 9

It is a region of the probability distribution which if the test falls within causes a rejection of Ho

Question 10

What is the critical value

Answer 10

It is the first value to fall inside the critical region

Question 11

What are reasons for using a binomial distribution

Answer 11

2 outcomes
Probability is constant
Independant trials