Chapter 7

Question 1

statistic

Answer 1

a number that describes some characteristic of a sample

Question 2

parameter

Answer 2

a number that describes some characteristic of a population

Question 3

sampling variability

Answer 3

different random samples of the same size from the same population produce different values for a statistic

Question 4

smapling distribution

Answer 4

the distribution of values taken by the statistic in all possible samples of the same size from the same population

Question 5

sampling distribution of the sampling proportion

Answer 5

describes the distribution of values taken by the sample proportion (p hat) in all possible samples of the same size in the same population

Question 6

sampling distribution of the sample mean

Answer 6

describes the distribution of values taken by the sample mean (x bar) in all possible samples of the same size from the same population

Question 7

Central Limit Therom

Answer 7

when the sample size is greater than or equal to 30, the sample distribution of the sample mean is approximately normal
only for skewed data
skewed –> mean