4- Variability

Question 1

a sample statistic is UNBIASED if….

Answer 1

the average value of the statistic is equal to the population parameter

Question 2

a sample statistic is BIASED if…

Answer 2

the average value of the statistic either under estimates or over estimates the corresponding population parameter

Question 3

Adding a constant to each score _________ change the standard deviation

Answer 3

Adding a constant to each score does not change the standard deviation

Question 4

Multiplying each constant, _________________

Answer 4

Multiplying each constant, multiples the answer as well as that number

Question 5

rather than listing all the individual scores in a distribution research reports typically summarize the data by reporting only the _____ and the ___________

Answer 5

rather than listing all the individual scores in a distribution research reports typically summarize the data by reporting only the MEAN and the STANDARD DEVIATION

Question 6

a standard deviation of zero indicates there is ______________

Answer 6

a standard deviation of zero indicates there is no variability