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STRAIGHTERLINE
INTRODUCTION TO STAT ISTICS
QUESTIONS WITH COMPLETE
SOLUTIONS
Question :Four steps in the process of statistics
Correct answer:1. Producing Data
- Exploratory Data Analysis
- Probability
- Inference
Question :Categorical variable
Correct answer:places individuals into one of several
groups
Two types: nominal and ordinal
Question :Quantitative Variable
Correct answer:represents a measurement or a count
Two types: Interval and ratio
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Question :Nominal Variable
Correct answer:categorical variables where there is no
natural order among the categories
Question :Ordinal variable
Correct answer:categorical variables where there is
natural order among the categories
Question :Interval Variable
Correct answer:a measurement or count for which it
makes sense to talk about the difference between values, but it does not make sense to talk about the ratio between values; 0 does not represent the absence of quanitity
Question :Ratio Variable
Correct answer:quantitative variables for which it makes
sense to talk about the difference between values AND the ratio between values; 0 represents the absence of quantity
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Question :What type of variable?: eye color
Correct answer:nominal
Question :What type of variable?: socioeconomic status with categories low, med, high
Correct answer:Ordinal
Question :What type of variable?: Temperature
Correct answer:Interval
Question :What type of variable?: Income
Correct answer:Ratio
Question :Visual display and numerical summary for a
single categorical variable
Correct answer:pie chart or bar chart
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and category percentages
Question :Visual display and numerical summary for a
single quantitative variable
Correct answer:histogram or stemplot
and descriptive statistics
Question :Visual display and numerical summary for C-
>C
Correct answer:Two way table and conditional
percentages
Question :Visual display and numerical summary for C-
>Q
Correct answer:Side by side box plots and descriptive
statistics
Question :Visual display and numerical summary for Q-
>Q