Chapter 5-8

Question 1

Sample

Answer 1

A smaller portion taken from the population

Question 2

Primary source data

Answer 2

Collected directly by researcher

Question 3

Micro data

Answer 3

Data collected on one individual

Question 4

Secondary source data

Answer 4

Data used by someone other than whose who actually collected them

Question 5

Aggregate data

Answer 5

Combined data that cannot be broken down

Question 6

Response bias

Answer 6

When participants change their answer due to personal feelings or embarrassment

Question 7

Sampling bias

Answer 7

When sample does not represent the population on a whole

Question 8

Non response bias

Answer 8

When opinions are only given by those who are on either side of spectrum due to personal beliefs and strong feelings

Question 9

Measurement bias

Answer 9

When the method is such that t.he characteristics are over or under represented

Question 10

Mean

Answer 10

Sum of data divided by number of entries (sample mean is xbar)

Question 11

Median

Answer 11

Middle value of all data

Question 12

Mode

Answer 12

Data that occurs most often

Question 13

Percentile

Answer 13

Percent of data that are less than or equal to a value

Question 14

Quartile

Answer 14

Three points that divide the data into three equal parts (25 is the smallest) (50 is the median) (75 is the largest)

Question 15

Interquartile range

Answer 15

Difference between first and third quartile

Question 16

Standard deviation

Answer 16

Square root of the variance

Question 17

Sample z score

Answer 17

Xbar

Question 18

Zscore

Answer 18

How many standard deviations away

Question 19

Population

Answer 19

All the individuals in a study group

Question 20

Normal distribution

Answer 20

Continuous, symmetrical, bell shape probability

Question 21

Confidence interval

Answer 21

How confident you are the mean lies within a certain interval

Question 22

Confidence Level

Answer 22

How confident you are a stat is within a particular range

Question 23

Margin of Error

Answer 23

Range of values a measurement is said to be in

Question 24

Cause and effect relationship

Answer 24

Correlation between two variables in which a change in one directly effects the other

Question 25

Presumed relationship

Answer 25

Looks like it makes sense but doesn’t

Question 26

Reverse cause and effect

Answer 26

Independent and dependent variable are reversed

Question 27

Accidental relationship

Answer 27

Self explanatory

Question 28

Residual plot

Answer 28

Difference between a data points actual dependent variable and dependent value predicted by line of best fit