Question

Case 12.1

Determine what variables are categorical (either nominal or ordinal scales), perform the appropriate descriptive analysis, and interpret it.

Answer #1

A categorical variable is a type of variable that has two or more categories but no order. It is also called nominal variable. Gender, religion, college major,brands of a product, disability or skin colour are all categories. When variables assigned to these categories are known as categorical variables. Categorical variables differ from person to person. Gender and religion are categories whereas male, female are categorical variables of category gender, similarly hindu, muslim, christian,jain etc. are categorical variables of category religion.

Categorical variables have no orders, it means they are not ordered
from highest to lowest or vice-versa. There is no specific order to
male and female, if there is any order then those variables are
called ordinal variables.

Ordinal variables are those variables that have a specific order,
for exa, temperature is a variable which has categories like low,
medium and high. Although these are categories, there is a specific
order. So temperature is an ordinal variable. Similarly,
educational experience is a variable with different categories
which are ordered from lowest to highest or highest to lowest as
per the individual requirement. For exa, educational experience
with categories like elementary, higher secondary, graduate or
masters' degree.

(a) In each of the following, determine which of the four
levels/scales of measurement (nominal,
ordinal, interval, ratio) is most appropriate.
(i) Salaries of beginning insurance agents.
(ii) Survey responses of: “Strongly agree, agree, disagree,
strongly disagree.”
(iii) Visa credit card numbers.
(iv) Nationalities of students in a survey.
(v) Times required to lubricate a car at a garage.
(vi) The daily ‘low temperature’ for the last month in your
town.
(vii) Telephone area codes.
(viii) Consumer Reports hotel ratings...

Determine which of the four levels of measurement (nominal,
ordinal, interval, ratio) is most appropriate. The rank of
contestants in a competition.
nominal
Interval
ratio
Ordinal

Classify each of the following variables as either measurable
(continuous) or categorical. If a variable is categorical, indicate
whether it is nominal or ordinal. Justify your answer. (Note: No
marks will be given without justifications.) a. The level of
impurity in water (measured in milligrams per liter). b. The
various political parties in Singapore. c. The education level of
employees of a certain company. d.
5-point Likert scale used in surveys. The 5 points are described as
‘Strongly Disagree’, ‘Disagree’,...

for
each of the following variables, determine whether the variable is
categorical or numerical. if the variable is numerical, determine
whether the variable is discrete or continuous. in addition,
determine the measurement scale.
1. time, in hours, spent working per day.
2. name of a households cable television provider.
3. number of hamburgers ordered in a day.
4. satisfaction rating of a cable television provider (from
low to high).
5. number of online purchases made in a day.
A. this...

Describe the four levels of measurement that are needed to
determine what descriptive statistics to perform on a dataset.
Describe when each measure is appropriate.

For each variable, determine the scale of measurement (nominal,
ordinal, interval, or ratio) and the type of variable (categorical
or numerical); if it is numerical is it discrete or continuous?
Justify your decision for each one
What school did the participant attend?
What is the highest level of education for the participants
parent?
Is the participant a female or not?
What is the annual income for the participant's household?
What is the participant's math outcome score?
How many students are...

If im trying to
determine correlation between two variables, BMI & ethnicity
what kind of stastical test should i run? Race is a independent
categorical , and nominal. BMI is dependent is quantitive and
continuous
Hypothesis:
In a systematic review researchers found a higher prevalence
among racial minorities compared to white/Anglos or any other
race.
In conclusion, it is hypothesized that participants which are
Latinos will show a positive correlation of increase BMI compared
to other ethnic groups.

Regression Analysis 1. At the end of the Regression Analysis
with Categorical Data lecture, there was a prompt about a multiple
regression analysis conducted to examine the factors influencing
police arrests. There are two competing theories of when the police
make arrests: Situational Threats: police only make arrests when
protestors use violent or illegal tactics. When demonstrators step
out of line, the police respond accordingly. Non-Behavioral
Threats: while the tactics protestors use are certainly important,
the police are more aggressive...

Part C: Regression and Correlation Analysis
Use the dependent variable (labeled Y) and the independent
variables (labeled X1, X2, and X3) in the data file. Use Excel to
perform the regression and correlation analysis to answer the
following.
Generate a scatterplot for the specified dependent variable (Y)
and the X1 independent variable, including the graph of the "best
fit" line. Interpret.
Determine the equation of the "best fit" line, which describes
the relationship between the dependent variable and the selected...

Use the dependent variable (labeled Y) and the independent
variables (labeled X1, X2, and X3) in the data file. Use Excel to
perform the regression and correlation analysis to answer the
following.
Generate a scatterplot for the specified dependent variable (Y)
and the X1 independent variable, including the graph of the "best
fit" line. Interpret.
Determine the equation of the "best fit" line, which describes
the relationship between the dependent variable and the selected
independent variable.
Determine the coefficient of...

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