Exam (elaborations)
section b. MNO2602 ALL CALCULATIONS AND GRAPHS
- Course
- Institution
SECTION B Answers with graphs and calculations for June assignment 3
[Show more]
1 review
By: joubertjeandre • 2 year ago
Seller
Follow
rutendodube031
Reviews received
Content preview
QUESTION 22.1 The following dataset contains the number of defects found on each of 12
randomly chosen bicycle frames manufactured by Luigi Bikes Inc. over a period of
two weeks:
5 7 15 9
19 8 16 16
9 5 7 10
The formula for calculating the number of classes for a histogram is as follows:
k≥log12/log2 where: n = number of data values k = the number of classes
Since there are 12 observations in the data set, we have n = 12. Therefore:
k≥log12/log2 k=4 Now, with 4 classes, the class width is:
=Range /k
= (16-4)/4 =3
The frequency distribution is as follows:
Class Frequency
4-7 4
8-11 4
12-15 1
16-19 3
, Histogram
4.5
4
3.5
3
FREQUENCY
2.5
2
1.5
1
0.5
0
1 2 3 4
CLASS
Class Frequency
2.2 The management of Thembisa post office is concerned about the number of
customer complaints. They decide to use Pareto analysis as a first step in solving
this problem. The necessary data were collected, and the results are shown below:
Draw a Pareto chart and point out how it reflects the 80/20 principle. (4) [Hint: Use
the codes given in the table to represent the causes in the chart].
First, we order the causes according to their frequency, from largest to smallest, and
then construct a frequency table containing the frequencies, percentages, and
cumulative percentages.
Code Description Frequency Percentag Cumulative
e percentage
D Unreliable international post 62 41.3 41.3
I Poor general customer 56 37.3 78.6
service
C Inconsistent delivery times 10 6.7 85.3
B Unfriendly teller assistant 8 5.3 90.6
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller rutendodube031. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.95. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80364 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now