Midterm I

Question 1

Population

Answer 1

the entire collection of individuals who are of interest and who you want to make conclusions about

Question 2

Sample

Answer 2

representative sample of individuals from the target population

Question 3

Parameter

Answer 3

Descriptive measure of a population

Question 4

Statistic

Answer 4

Descriptive measure of a sample

Question 5

Explanatory or response variables

Answer 5

Independent variables: Variables that affect other variables but are not affected by other variables

Question 6

Extraneous variables

Answer 6

Variables that are not of interest. May lead to error

Question 7

stratified random sampling

Answer 7

the population is divided into strata based on prior information.
Sampling intensity in each strata is proportional to the estimated density of individuals

alberta example

Question 8

Cluster random sampling

Answer 8

Randomly select a block of people. All people within this block are tested

Question 9

voluntary response bias

Answer 9

asking for volunteers to participate in a social survey:People who favour something are more likely to volunteer

Question 10

what measures the centre

Answer 10

mean

Question 11

what measures the spread

Answer 11

standard deviation

Question 12

sample size for normal distribution

Answer 12

<30

Question 13

between a small sample and a large sample, when sampling is taken, which has more variability

Answer 13

smaller sample has more variability

Question 14

Random Sampling

Answer 14

Question 15

Observational studies:
Population inferences
Casual Inferences

Answer 15

Question 16

Prospective vs retrospective

Answer 16

Question 17

Experimental studies:
Casual Inferences
Population Inferences

Answer 17

Question 18

Single vs double blind experiments

Answer 18

Question 19

relative frequency

Answer 19

Question 20

left skewed

Answer 20

Question 21

right skewed

Answer 21

Question 22

median and mean resistance

Answer 22

Question 23

best measure of centre for skewed and symetrical distributions

Answer 23

Question 24

mean, median, and mode in right and left skewed distributions

Answer 24

Question 25

standard deviation and variance for populations

Answer 25

Question 26

calculating quartiles

Answer 26

Question 27

Parts of a boxplot

Answer 27

Question 28

using quartiles to tell if theres a skew

Answer 28

Question 29

what is used for spread and standard deviation in:
1. Skewed
2. Symmetric

Answer 29

Question 30

height calculation for a uniform distribution

Answer 30

Question 31

variance between two values

Answer 31

Question 32

population standard deviation

Answer 32

Question 33

finding z or probability for sample mean

Answer 33

Question 34

probability or z score for sample proportion

Answer 34

Question 35

standard deviation for sample proportion

Answer 35

Question 36

assumption of normality for proportion

Answer 36

Question 37

what is the “who” in a study

Answer 37

study units: The person or thing whose responses are being measured on

Question 38

Central limit theory

Answer 38

Question 39

Mean for two points on a rectangle

Answer 39

Question 40

Probability between two points sometimes on a rectangle

Answer 40

This finds the actual probability not the z score

Question 41

Variance between two points on a rectangle

Answer 41

Question 42

how to calculate mean for sample mean

Answer 42

(n) (mean/u)

Question 43

how to calculate standard deviation for sample mean

Answer 43

SD x square root of n