代写STATS 101/101G/108 Introduction to Statistics

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STATS 101/101G/108 Introduction to Statistics

Assignment 3, Second Semester 2016

Due: 3pm Wednesday 12th October

Read these instructions carefully.

Marks

• Assignment 3 is worth 10% of your final mark. Do not leave it until the last day.

• It will be marked out of 85 marks, 80 marks for the questions as shown and 5 marks

for communication and presentation. See below for how these 5 marks are

allocated. Your final mark will be converted to a mark out of 10 which will be

recorded towards your course work.

• Statistics is about summarising, analysing and communicating information.

Communication is an important part of statistics. For this reason you will be

expected to write answers which clearly communicate your thoughts.

• Communication and Presentation marks:

‐ Demonstrated clear sentence structure: this includes correct use of full stops

and capital letters; not writing excessively long or complicated sentences;

attention to spelling and grammar.

‐ Demonstrated ability to communicate information clearly in sentences: this

includes sentences easily conveying the correct idea; sentences making sense;

comments not being excessively long or short; conclusions following logically

from previous statements.

‐ Assignment tidily set out and easy to follow: this includes the answers being

clearly set out in the correct order; the assignment not being overly messy;

graphs and plots are tidy with correct labelling of axes; the assignment including

the correct cover sheet being clipped together or stapled.

‐ Follow the “Step‐by‐Step Guide to Performing a Hypothesis Test by Hand” as

required.

A ”t‐test by hand” can be handwritten or typed!

‐ Student ID number shown somewhere on the assignment: this can be on the

inside of the cover sheet or on the top of the first page of the assignment.

Question guide

• Attempt questions 1, 2 and 3 when Chapter 7 has been covered.

• Attempt question 4 when the first half of Chapter 8 has been covered.

• Attempt questions 5 and 6 when all of Chapter 8 has been covered.

Hypothesis tests in this assignment

• Practical significance:

‐ Apart from question 3, you do NOT need to interpret hypothesis tests in

terms of practical significance.

• In question 4:

‐ You must clearly show that you have followed steps 1, 2, 3, 7, 9 and 10 in the

“Step‐by‐Step Guide to Performing a Hypothesis Test by Hand”, Lecture

Workbook, page 11, Chapter 7. The other steps are replaced by your

computer output, which you must hand in.

• Report P‐values to 3 or 4 decimal places.

Computer use in this assignment

• Make sure you are prepared for questions 4 and 5 before you begin to use the

computer.

• Hand in all computer output for questions 4 and 5.

• When carrying out a two independent sample t‐test using SPSS do not assume

equal variances.

Plots in this assignment

• Make sure you follow the instruction given in the question when you are

required to construct a plot. By hand (for plots) means using a pen and a ruler!

Notes

• The format and handing in of Assignment 3 is the same as that for Assignments

1 and 2. Refer to the instructions on page 1 of those two assignments.

• Refer to the Worked Examples file under Assignments and Assignment

Resources on Canvas for examples of how to set out your answers.

• Refer to the Lecture Workbook, Section A (Course Information), page 3,

Assignment Rules: Working together versus cheating
代写STATS 101/101G/108 Introduction to Statistics