Chapter 8

Question 1

Confidence Interval

Answer 1

Range of values that contains the population parameter of interest

Question 2

Interval Estimate

Answer 2

Confidence Interval

Question 3

Margin of Error

Answer 3

Value that accounts for the standard error of the estimator and the desired confidence level of the interval

Question 4

Confidence Coefficient

Answer 4

Probability that the estimation procedure will generate an interval that contains the population parameter of interest

Question 5

t Distribution

Answer 5

Family of distributions that are similar to the z distribution except that they have broader tails. Identified by their degrees of freedom df

Question 6

t Distribution Formula

Answer 6

T = (Xbar - pMean) / (s/ Sqrt(n))

Question 7

Degrees of Freedom

Answer 7

Number of independent pieces of information that goes into the calculation of a given statistic

Question 8

Sample Size (n) Formula

Answer 8

n = ((Za/2 * SD)/ MarginofError(E))^2

Question 9

Margin of Error (E) Formula

Answer 9

E = Za/2 * (SD / Sqrt(n))