Stats chapter the nature of statistics

Question 1

advantages of sampling

Answer 1

limited resources so sampling is cheaper
less personal required to administer study so less chance of error
results available faster
if the study units destroys what is being sample then there is no point in texting the whole population e.g. light bulb life span
may be different ease of access to sample units

Question 2

target population

Answer 2

finite set of all individuals of interest

Question 3

study population

Answer 3

the part of the target population from which the sample will be taken

Question 4

population characteristic (perameter)

Answer 4

the aspect of population that is of interest e.g. which 18 year olds in glasgow will vote in the next general election

Question 5

sampling uni

Answer 5

a single number of the target population

Question 6

sampling frame

Answer 6

a set of all sampling units e.g. a list or database

Question 7

simple random sapling

Answer 7

eac individual in the target population has an equal chance of being studied