202201 Tutorials 1-11.pdf - UKEQ1023 Quantitative...

UKEQ1023 Quantitative Techniques II 202201
1
UNIVERSITI TUNKU ABDUL RAHMAN
FACULTY OF ACCOUNTANCY AND MANAGEMENT
TUTORIAL 1
1. For each of the following variables, determine whether the variable is categorical or
numerical and determine whether the variable is discrete or continuous.
(i) Number of cellphones in the household.
(ii) Monthly data usage (MB).
(iii) Number of text messages exchanged per month.
2. Identify the scale measurement likely represented by this information:
(i) In rating the service provided by a receptionist, the following responses are
possible: excellent, above average, average, below average, and poor. The
responses are coded from 1 to 5 with 5 being excellent. The scale of measurement
these represent is Answer: _________.
(ii) Professor Khezri graduated from Western Australia with a code value = 2 while
Professor Janet graduated from Sydney University with a code value = 3. The scale
of measurement likely represented by this information is Answer: _________.
(iii). An insurance agent believes that company A is more reliable than company B .
Which scale of measurement does this information represent? Answer: _________.
3. The following is a set of the data from a sample of n = 11 items.
Employee A B C D E F G H I J K
Weeks of experience (x) 7 5 8 3 6 10 12 4 9 15 18
Number of rejects (y) 21 15 24 9 18 30 36 12 27 45 54
Interpret the following value:
i) covariance at 65.2909
ii) coefficient of correlation at 1.0
Class activity (Group)
Student will be given a time to complete the class activity group and explain their answers.
1. Health care issues are receiving much attention in both academic and political arenas. A
sociologist recently conducted a survey of citizens over 60 years of age whose net worth
is too high to quality for medical assistance. The ages of 25 senior citizens were as
follows:
66, 68, 68, 69, 70, 73, 73, 74, 75, 76, 61, 60, 87, 89, 90, 92, 64, 65, 62, 63, 73, 81, 81, 82,
86
(i) Find the mean, median, and mode of this data.
(ii) What is the best measurement of central tendency for this data?
(iii) Compute the standard deviation of this data.

UKEQ1023 Quantitative Techniques II 202201
2
2. Social media provides an enormous amount of data about the activities and habits of
people using social platforms like Facebook, Instagram and Twitter. The belief is that
mining that data provides a treasure trove for those who seek to quantify and predict
future human behavior. A marketer is planning a survey of Internet users in the
Philippines to determine social media usage. The objective of the survey is to gain insight
on these three items: key social media platforms used, frequently of social media usage,
and demo-graphics of key social media platform users.
(a) For each of the three items listed, indicate whether the variables are categorical or
numerical. If a variable is numerical, is it discrete or continuous?
(b) Develop five categorical questions for the survey.