module 1

Question 1

the blue print for any statistical project is the _____.

a) sampling data
b) study design
c) data
d) observational unit

Answer 1

b) study design

Question 2

what are the five hierarchical scales used to characterize study designs? define them

Answer 2

• observation unit (collecting actual data, subject for the study)
• sampling unit (central, thing selected at random in the study)
• sample (collection of all sampling units)
• statistical population (collection of all possible sampling units that could be in your sample)
• population of interest (what you’re trying t make a statement with)

Question 3

t or f: the sampling unit must be the same as the observational unit

Answer 3

false: it may be, or it may contain multiple observational units

Question 4

if 72 people replied to your email about their favourite grocery store, then your _______ includes the 72 email responses.

Answer 4

sample

Question 5

Statistical population

Answer 5

all sampling units that could have been in your sample

Question 6

population of interest

Answer 6

• collection of sampling units you hope to draw a conclusion about
• ideally the same as statistical population but is often larger

Question 7

sample

Answer 7

collection of sampling units you collect

Question 8

the _____ is defined by your research question whereas the _____ is defined by your study design

Answer 8

population of interest, satistical population

Question 9

measurement unit and measurement variable

Answer 9

variable: what you are measuring abt the observational unit
- unit: scale of the measurement variable (for numeric only) ie cm for height or years/months for age

Question 10

descriptive vs inferential stats

Answer 10

descriptive: characterizes data in your sample (tables, averages, graphs etc), describes data and makes a statement about the data
inferential: uses info from sample to make a probabilistic statement about the statistical population and makes conclusions about the statistical population

Question 11

name the 4 steps in full framework for stats

Answer 11

1. sampling
2. measuring
3. calculating descriptive stats
4. calculating inferential stats

Question 12

t or f: When there are multiple groups in the statistical population, the descriptive and inferential statistics are repeated for each group.

Answer 12

f: When there are multiple groups in the statistical population, the descriptive statistics are repeated for each group. Inferential statistics are done only once for the statistical population and can be used to make statements about the difference among groups.