Population, birth rate and PMCC

Question 1

What is the formula for standardised birth rate?

Answer 1

standardised birth rate = crude birth rate / 1,000 x standard population

Question 2

What is PMCC?

Answer 2

Pearson’s product moment correlation coefficient / r

Question 3

What is PMCC used for?

Answer 3

It is used to measure the strength of linear correlation between two sets of data

Question 4

What do the different values of r mean?

Answer 4

If r close to 1 there is a strong positive correlation

If r is close to zero there is no correlation

If r is close to -1 there is a strong negative correlation

Question 5

What is the difference between Pearson’s product moment correlation coefficient and Spearman’s rank correlation coefficient?

Answer 5

PMCC is suitable for data that shows linear correlation

SRCC is suitable for data that shows a non-linear correlation

Question 6

Define ‘population’

Answer 6

Everything or everybody that could possible be involved in an investigation

Question 7

Define ‘sample frame’

Answer 7

A list of the people or items that are to be sampled

Question 8

Define ‘sample’ or ‘sampling units’

Answer 8

The people or items that are to be sampled