Test 2

Question 1

Numerical variables

Answer 1

Quantitative variable

Question 2

Set of observations from a population

Answer 2

Sample

Question 3

Set of observations that can be made

Answer 3

Population

Question 4

a quantity or statistical measure that, for a given population, is fixed and that is used as the value of a variable in some general distribution or frequency function to make it descriptive of that population

Answer 4

Population parameter

Question 5

a single value given as an estimate of a parameter of a population.

Answer 5

Point estimate

Question 6

maximum expected difference between the true population parameter and a sample estimate of that parameter

Answer 6

Margin of error

Question 7

to express the degree of uncertainty associated with a sample statistic. A confidence interval is an interval estimate combined with a probability statement.

Answer 7

Confidence Interval

Question 8

states that the sampling distribution of the mean of any independent, random variable will be normal or nearly normal, if the sample size is large enough.

Answer 8

Central Limit Theorem

Question 9

What is the criteria for normality?

Answer 9

Unimodal, free of outliers, and symmetry