6/30/25, 12:14 PM Straighterline Introduction to Statistics EXAM (2025 updated) QUESTIONS AND ANSWERS (DETAILED & ELABORATED) fully s…
Straighterline Introduction to Statistics EXAM
(2025 updated) QUESTIONS AND ANSWERS
(DETAILED & ELABORATED) fully solved
Save
Terms in this set (58)
1. Producing Data
Four steps in the process 2. Exploratory Data Analysis
of statistics 3. Probability
4. Inference
places individuals into one of several groups
Categorical variable
Two types: nominal and ordinal
represents a measurement or a count
Quantitative Variable
Two types: Interval and ratio
categorical variables where there is no natural order
Nominal Variable
among the categories
categorical variables where there is natural order
Ordinal variable
among the categories
a measurement or count for which it makes sense to
talk about the difference between values, but it does
Interval Variable
not make sense to talk about the ratio between
values; 0 does not represent the absence of quanitity
quantitative variables for which it makes sense to talk
Ratio Variable about the difference between values AND the ratio
between values; 0 represents the absence of quantity
https://quizlet.com/1057696677/straighterline-introduction-to-statistics-exam-2025-updated-questions-and-answers-detailed-elaborated-fully-solved-fla… 1/6
, 6/30/25, 12:14 PM Straighterline Introduction to Statistics EXAM (2025 updated) QUESTIONS AND ANSWERS (DETAILED & ELABORATED) fully s…
What type of variable?: nominal
eye color
What type of variable?: Ordinal
socioeconomic status with
categories low, med, high
What type of variable?: Interval
Temperature
What type of variable?: Ratio
Income
Visual display and pie chart or bar chart
numerical summary for a and category percentages
single categorical variable
Visual display and histogram or stemplot
numerical summary for a and descriptive statistics
single quantitative variable
Visual display and Two way table and conditional percentages
numerical summary for C-
>C
Visual display and Side by side box plots and descriptive statistics
numerical summary for C-
>Q
Visual display and Scatterplot and correlation coefficient (r)
numerical summary for Q-
>Q
Approximately
68% of observations fall within 1 sd of the mean,
Standard Deviation Rule
95% within 2 sd,
99.7% (or virtually all) within 3 sds
Middle 50% of the data
Interquartile Range (IQR)
IQR= Q3-Q1
https://quizlet.com/1057696677/straighterline-introduction-to-statistics-exam-2025-updated-questions-and-answers-detailed-elaborated-fully-solved-fla… 2/6
Straighterline Introduction to Statistics EXAM
(2025 updated) QUESTIONS AND ANSWERS
(DETAILED & ELABORATED) fully solved
Save
Terms in this set (58)
1. Producing Data
Four steps in the process 2. Exploratory Data Analysis
of statistics 3. Probability
4. Inference
places individuals into one of several groups
Categorical variable
Two types: nominal and ordinal
represents a measurement or a count
Quantitative Variable
Two types: Interval and ratio
categorical variables where there is no natural order
Nominal Variable
among the categories
categorical variables where there is natural order
Ordinal variable
among the categories
a measurement or count for which it makes sense to
talk about the difference between values, but it does
Interval Variable
not make sense to talk about the ratio between
values; 0 does not represent the absence of quanitity
quantitative variables for which it makes sense to talk
Ratio Variable about the difference between values AND the ratio
between values; 0 represents the absence of quantity
https://quizlet.com/1057696677/straighterline-introduction-to-statistics-exam-2025-updated-questions-and-answers-detailed-elaborated-fully-solved-fla… 1/6
, 6/30/25, 12:14 PM Straighterline Introduction to Statistics EXAM (2025 updated) QUESTIONS AND ANSWERS (DETAILED & ELABORATED) fully s…
What type of variable?: nominal
eye color
What type of variable?: Ordinal
socioeconomic status with
categories low, med, high
What type of variable?: Interval
Temperature
What type of variable?: Ratio
Income
Visual display and pie chart or bar chart
numerical summary for a and category percentages
single categorical variable
Visual display and histogram or stemplot
numerical summary for a and descriptive statistics
single quantitative variable
Visual display and Two way table and conditional percentages
numerical summary for C-
>C
Visual display and Side by side box plots and descriptive statistics
numerical summary for C-
>Q
Visual display and Scatterplot and correlation coefficient (r)
numerical summary for Q-
>Q
Approximately
68% of observations fall within 1 sd of the mean,
Standard Deviation Rule
95% within 2 sd,
99.7% (or virtually all) within 3 sds
Middle 50% of the data
Interquartile Range (IQR)
IQR= Q3-Q1
https://quizlet.com/1057696677/straighterline-introduction-to-statistics-exam-2025-updated-questions-and-answers-detailed-elaborated-fully-solved-fla… 2/6
