Definitions: Chapter 12

Question 1

Degrees of freedom:

Answer 1

adjusted value of the sample size (N-1/ N-2)

• the number of independent pieces of information remaining after estimating one or more parameters.

Question 2

Central Limit Theroum:

Answer 2

specifies the nature of the sampling distibution of the mean:

Question 3

T distribution:

Answer 3

sampling distribution of the t statistic

Question 4

Effect size:

Answer 4

the difference between two popuations, divided by the standard deviation of either population

mean of x1 subtract mean of x2 / standard deviation of x1

Question 5

Interval estimate:

Answer 5

range of values estimated to include the parameter

Question 6

Confidence limits

Answer 6

the limits at either end of an interval, with a specified probability of including the paramater being estimated

Question 7

Confidence Interval:

Answer 7

an interval, with limits at either end, having specified probability of including the paramater being estimated ?!