probabilistic sampling

each member of the population is chosen strictly by chance.

what is Descriptive Statistics

graphical and numerical procedures to summarize and process data.

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stats 1st class

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Questions 14

Answers

1
Parameter: numerical measure that describes a specific characteristic of a sample
False
True
2
Number of vacation days of the inhabitants living in a town
Categorical nominal scale
numerical discrete ratio
numeral continuous interval
Categorical ordinal
3
Preferences among of soft-drinks in a sample of 500 teenagers
Categorical ordinal
Categorical nominal scale
numeral continuous interval
numerical discrete interval
4
what is stats ?
science that calculate to reach conclusions
art that studies how to reach conclusions from maths formulas
science that studies how to reach conclusions from data observation
studies how to reach conclusions from mathematical observation
5
Satisfactions in terms of likes in a movies recommendation system
Categorical ordinal
numerical discrete interval
Categorical nominal scale
numeral continuous interval
6
number of siblings
qualitative
quantitative
7
temperature
discrete
continous
8
what is not a use of stats ?
Finance: risk analysis.
Marketing: market research.
none of them
Operations: waiting times, quality control.
9
age
continous
discrete
10
Values computed from sample data are called statistics
False
True
11
what is that ?
sample (observed subset of the population) (n represents the sample size).
population (collection of all items of interest or under investigation ) N
12
eye color is
Categorical or Qualitative
Discrete
Numerical or Quantitative
continous
13
probabilistic sampling
each member of the population is chosen strictly by chance.
each member of the population is chosen based on the researcher criteria.
14
what is Descriptive Statistics
uses only numerical procedures to summarize data
make predictions, forecasts and estimates to assist decision making
using data to make only forecasts
graphical and numerical procedures to summarize and process data.

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