Analyzing data (Section 11.8)

Question 1

Statistics

Answer 1

The study of data analysis and interpretation

Question 2

Sample

Answer 2

A subset of a population; used to gather information about a group

Question 3

Random sample

Answer 3

All members of the population are equally likely to be chosen in the sample

Question 4

Biased

Answer 4

A part of a population is over represented or underrepresented in a sample; can yield misleading results.

Question 5

Convenience Sample

Answer 5

Members are selected from the population based on who is convenient and readily available

Question 6

Self-Selected Sample

Answer 6

Members of the population are selected based upon who volunteers for the sample

Question 7

Systematic Sample

Answer 7

The population in ordered in some way, then the members are selected for it in regular intervals. (Ex.: every 5th person)

Question 8

Random Sample

Answer 8

All members of the population are equally likely to be chosen

Question 9

Observational Study

Answer 9

You measure or observe members of a sample in such a way that they are not affected by the study

Question 10

Controlled Experiment

Answer 10

The sample is divided into two groups: the treatment group and the control group. The treatment group is manipulated (i.e. given medicine, etc.) and compared against the control group.

Question 11

Survey

Answer 11

every member of the sample is asked a set of questions.

Question 12

Measures of Central Tendency

Answer 12

Values that help describe the “middle” of data sets. Mean, median, and mode are all examples of measures of central tendency

Question 13

Mean

Answer 13

The average (sum of data values / number of values)

Question 14

Median

Answer 14

Middle value or mean of two middle values

Question 15

Mode

Answer 15

The value that occurs most often

Question 16

Range

Answer 16

The difference between the highest and the lowest numbers

Question 17

Outlier

Answer 17

A value is substantially different from the rest of the data