Minitab代写-MAST10010-Assignment 1
时间:2021-08-29
MAST10010: Data Analysis 1
Assignment 1
Due Date: Monday August 30th, 11.59pm.
? Your assignment must be submitted to Gradescope by 11.59pm Monday 30th Au-
gust.
? Assignments submitted late will incur a penalty of 1% per hour (or part thereof).
If you have exceptional circumstances that prevent you from meeting the deadline,
please email paul.fijn@unimelb.edu.au, and I may be able to grant an extension.
? Tutors may not help you directly with assignment questions. They may, however,
provide some appropriate guidance.
? Please ask on the discussion board if you need clarification on the wording of ques-
tions.
? It is recommended to produce a single Word document which includes all the relevant
graphs, statistics and comments. If you need to include formulas or calculations,
you may include photos of handwritten notes (or use equation editor, or any other
method).
This assignment consists of five (5) questions worth a total of 35
marks. It contributes 5% towards your final grade.
1
2Instructions
Software:
You must use Minitab to produce any graphs, tables and descriptive statistics.
Graphs:
? must include your name/student number, which can be added by right-clicking the
graph and selecting Add → Footnote or Add → Subtitle.
? must be relevant. You may look at many graphs, but you should only include the
most relevant graph for each question.
? should be clear: ensure that labels and titles are correct and appropriate; you can
add gridlines/change symbols/colour as appropriate to make the graph clearer.
There are some marks awarded for improving upon the default from Minitab.
? Mac Users: you will need to use myUniApps in order to edit the graphs as required
above.
Statistics:
Must be relevant: you will be penalised for including statistics which are not relevant to
the questions asked.
Comments:
? must be in the context of the data.
? should be supported by relevant statistics where possible.
? should be concise and informative. Word limits, where given, must be strictly ad-
hered to (all word limits are a maximum, you will be penalised for going over this
limit!). You may use dot-points.
Question 1: Study Design [0 + 2 + (2+2+2+2) = 10 marks]
In tutorial 2 you designed studies to investigate research questions. For this question you
may used ideas from the class discussion, butmust write and submit your own work.
While it is recommended to use the same question you discussed in the tutorial, you may
also choose another question that was not discussed in your class.
You are allowed to simplify or adjust the question to make it more practical, and may
also make reasonable assumptions about what is possible/feasible (you should clearly state
these assumptions). For example, in a study to determine “How many sheep do you need
to count before falling asleep?”: it is reasonable to assume that people would be able to
remember (approximately) the number they got to before falling asleep; it is not reasonable
to assume that you can measure their brainwaves to determine this number.
3Select ONE of the following 13 research questions:
1 Monitoring the effect upon river health of an outbreak of an algal bloom.
2 Determining the effect upon AFL anterior-cruciate ligament longitude of a new boot
design.
3 Is chiropractic manual therapy an effective treatment for infant colic (unexplained
persistent crying)?
4 Is a new chemotherapy drug effective in treating cancer?
5 Is yoga an effective treatment for back pain?
6 Does organically grown food contain more nutrients than non-organic food?
7 Is starch consumption good for the obese?
8 Can a diet high in heart-healthy foods and antioxidants reduce the risk of developing
Alzheimer’s disease?
9 Is the population of minke whales in Antarctica decreasing significantly?
10 Mobile phone usage and brain function - should we be worried?
11 Does playing action video games improve your surgery skills?
12 Do genetically modified soybeans have different (better) nutrient value than standard
varieties?
13 Cows at Melbourne University’s robotic dairy (Dookie) can decide when they are
milked. Are they Australia’s happiest dairy cows? (A claim made in a recent article
in Pursuit.)
For your selected research question:
(a) Clearly state the research question you are investigating (this should be the simpli-
fied/clarified question, if you have altered it).
(b) What are the Response Variable and primary Explanatory Variable? Clearly
state the specific data type (eg “discrete numerical”, “nominal categorical”,. . . ) of
each.
(c) For each of the following aspects of experimental design, explain how you would
implement them for your study, or why it is not possible/desirable to do so. You
will be assessed on both the content and the clarity of your explanations.
i. Comparison
ii. Control
iii. Blocking
iv. Replication
4The Sudoku Data
For questions 2, 3 and 4 you will need to access the data file Asst1 2021 sudoku (file
can be downloaded from the Assignment 1 page as a .csv file).
This file contains some of the data collected in the Sudoku Activity conducted in the
computer lab session in week 2 of this semester. The purpose of the study was to inves-
tigate factors that may affect time to complete a Sudoku puzzle. In this assignment we
will concern ourselves with a subset of this data, those who successfully completed their
assigned Sudoku puzzle.
The Variables:
Column Name
C1 Type of Puzzle Puzzle1: Greek alphabet letters (α, β, δ, λ, ε, μ)
Puzzle2: English lower case letters (a, b, c, d, e, f)
Puzzle3: Numbers (1, 2, 3, 4, 5, 6)
Puzzle4: Symbols (■, ,, , △, ?, ×)
C2 Minutes Time to completion: Minutes: Seconds:
C3 Seconds (recorded in separate columns, C2 and C3)
C4 Have you played
Sudoku before?
Yes / No
The Puzzles:
Data cleaning exercise: To begin this assignment you will first need to ensure that
columns C2 and C3 contains only sensible numbers. For example, the third row
has “1.43” for ‘Minutes’ and “103” for ‘Seconds’, but these should be changed to “1” and
“43”, respectively. You will also need to fix any other unusual values and/or values which
include text as part of the answer (remove the unnecessary text). You may need to do
the data cleaning in Excel before loading the data into Minitab. You will know you have
done this correctly if you have the following summary statistics:
You will also need to create a new variable Time (secs) to complete the puzzle.
5Question 2: Exploring the distribution of time taken to complete a Su-
doku puzzle [2 + 4 + 1 = 7 marks]
(a) Produce a dotplot and relevant summary statistics for Time (secs), time to success-
fully complete a Sudoku puzzle.
(b) Describe the distribution of Time (secs).
(c) Comment on whether the higher times (400 seconds or more) have anything in
common. Restrict your comments to two sentences at most.
[Hint: use the brush command.]
Question 3: Investigating the effect of Type of Puzzle
[3 + 5 = 8 marks]
(a) Produce a comparative boxplot and summary statistics, comparing the time taken
for the four (4) different puzzle types.
(b) Comment on the effect of Type of Puzzle on time to successfully complete a Sudoku
puzzle.
Your comments must be less than 150 words.
Question 4: Investigating the effect of other variables
[4 marks]
Produce a table comparing previous experience with Sudoku puzzles and taking more than
300 seconds to complete their puzzle. Include a short comment describing any association
apparent from the table.
Note: your table can be constructed by Minitab OR any other method.
6Question 5: Good statistical graphics [2 + 4 = 6 marks]
Consider the following graph (taken from the Young Liberals movement of Australia face-
book page):
(a) Identify two strengths of this graph.
(b) Identify two problems with this graph, and how these could be remedied.
You are not required to produce a graph for this question, however you can examine the
data in the file Asst1 2021 medals (from the Assignment 1 page) to help with your
critique. It is possible that I have classified governments differently (I am not an expert
in political history), so any mismatch between the numbers in the graph and the data file
is not relevant.



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