1
Q
Define point estimate
A
A single value estimate of a population parameter (e.g sample mean/m)
2
Q
Define interval estimate
A
A range of possible values of a population parameter (e.g confidence intervals)
3
Q
Define confidence interval (CI)
A
An interval of values for a population parameter, together with a specified level of confidence that the parameter is in that range
4
Q
What level of confidence do psychologists use?
A
95%
5
Q
95% of z-scores are within how many SDs from the population mean?
A
1.96
6
Q
For a sample size drawn at random from a normal distribution, where is the 95% confidence interval centred?
A
Centred on the sample mean, and goes from m-(1.96 x standard error) to m+(1.96 x standard error)
