1. Identify the level of measurement used tomeasure the following variables:a. Postal zip codeb. Student numberc. Ranking of students in a classd. Annual salary of employeee. Classification of heavy equipment asbulldozer, excavator, loader and roller2. Classify each of the following as a survey,an experiment, or an observation. Providea brief explanation for your answer.a. A local TV network asked voters toindicate whom they voted as they exitedthe polling booth.b. Theschooladministrationaskedstudents whether they are willing to havean increase in laboratory fees if there isan upgrade of computers.c. A private hospital divides terminally illpatients into two groups, with one groupreceiving better medicationother group receiving medication B. Aftera month, they measured each subject'sand theimprovement.3. Write a questionnaire to measure politicalawareness of students. Incorporate topicson the students political thinking andpreferences. Put questions regardingpersonal characteristics of students likeyear, sex, course, and others. Include amaximum of 15 questions only. Keep inmind the guidelines on questionnaireconstruction.

Since you have asked multiple questions, we will solve first question for you. If you want any…

1. Identify the level of measurement used to measure the following variables: a. Postal zip code b. Student number c. Ranking of students in a class d. Annual salary of employee e. Classification of heavy equipment as bulldozer, excavator, loader and roller

1. Identify the level of measurement used to measure the following variables: a. Postal zip code b. Student number c. Ranking of students in a class d. Annual salary of employee e. Classification of heavy equipment as bulldozer, excavator, loader and roller

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.

Question

1. Identify the level of measurement used to
measure the following variables:
a. Postal zip code
b. Student number
c. Ranking of students in a class
d. Annual salary of employee
e. Classification of heavy equipment as
bulldozer, excavator, loader and roller
2. Classify each of the following as a survey,
an experiment, or an observation. Provide
a brief explanation for your answer.
a. A local TV network asked voters to
indicate whom they voted as they exited
the polling booth.
b. The
school
administration
asked
students whether they are willing to have
an increase in laboratory fees if there is
an upgrade of computers.
c. A private hospital divides terminally ill
patients into two groups, with one group
receiving better medication
other group receiving medication B. After
a month, they measured each subject's
and the
improvement.
3. Write a questionnaire to measure political
awareness of students. Incorporate topics
on the students political thinking and
preferences. Put questions regarding
personal characteristics of students like
year, sex, course, and others. Include a
maximum of 15 questions only. Keep in
mind the guidelines on questionnaire
construction.

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