Statistics M. 1

Question 1

Statistics

Answer 1

the science of learning from data in the presence of variability

Question 2

population

Answer 2

the total set of all “individuals” of interest

Question 3

Sample

Answer 3

a subset of “individuals” selected from the population

Question 5

parameter

Answer 5

numerical characteristic of a population, a fixed quantity

Question 6

statistic

Answer 6

numerical characteristic of a sample, a variable quantity

Question 7

A statistical question contains…

Answer 7

1. a population
2. variables to be measured
3. variation in those variables

Question 8

variable

Answer 8

any characteristic observed in a study (columns)

Question 9

descriptive statistics

Answer 9

methods for organizing and summarizing information
-explore patterns
-used with sample data or with a population

Question 10

inferential statistics

Answer 10

methods for drawing conclusions about a population
-use sample data to learn about populations
-only used with sample data

Question 11

categorical variable

Answer 11

non-numerical variable with different categories
ex. types of pets owned by Stats 261 students

Question 12

quantitative variable

Answer 12

numerical variable
ex. number of siblings

Question 13

quantitative discrete variable

Answer 13

its possible yo form a set of separate numbers (count)
ex. shoe sizes, number of people

Question 14

quantitative continuous variable

Answer 14

its possible values form a continuum of values over the real number line (measure)
ex. height, weight, time