Inferential Statistics

Question 1

Inferential statistics are a branch of statistics that allows us to

Answer 1

draw conclusions, make predictions, or infer characteristics about a ‘population’ based on data collected from a ‘sample’

Question 2

Inferential statistics draw generalizations and inferences from

Answer 2

‘sample’ statistics to the ‘population parameters’

Question 3

Inferences are probabilistic because

Answer 3

even with adequate sampling procedures such as random sampling, always a chance of sampling error

Question 4

Confidence intervals

Answer 4

sample statistics are estimates of actual population parameters

Question 5

Confidence intervals: sampling errors = ???

Answer 5

difference between sample statistics and true population parameters

Question 6

We use inferential statistics to estimate

Answer 6

probably sampling error

Question 7

Central limit theorem

Answer 7

the sampling distribution of the sample mean will be approximately normal if the sample size is large enough, regardless of the population’s original distribution

Question 8

For confidence intervals the researcher decides

Answer 8

probability level

Question 9

Common confidence intervals

Answer 9

p = 0.95 (95% confidence interval)
p = 0.99 (99% confidence interval)