skills/statistics-assignment/references/EM2 Assignment Presentation Instructions for Students.txt

## PDF page 1

EM2 Statistics Assignment (Presentation) – Instructions 
You are expected to perform a hypothesis test to investigate a claim (or statement) 
about a population mean found in published media. First, identify the claim, gather 
relevant data, and then carry out a hypothesis test to determine whether there is 
sufficient or insufficient evidence to reject the claim. 
• Respond to all the parts of this instruction sheet. Present all your work on a 
spreadsheet application (using Microsoft Excel – Refer to blank template in LMS). 
• Create a video presentation of up to 4 minutes, explaining all parts of your work 
in the spreadsheet. Contents beyond 4 minutes will not be graded. 
• Record your video presentation in your own voice and upload it to YouTube, 
ensuring that you minimally appear with your face speaking into the video at the 
beginning, and, at the end of the video. 
• Ensure that your YouTube video is unlisted (not private!) and available minimally 
until the end of the current semester. 
 
→ This Statistics Assignment (Presentation) consists of 2 components:  
• Interim Progress Check (4%) 
• Video Presentation (8%) 
i.e. The Statistics Assignment (Presentation) constitutes 12% of your overall EM2 grade 
 
Component 1: Interim Progress Check (4%) 
In Week 2, you will attend a short progress check with your tutor.  
You are expected to: 
• Present a clear claim about a population mean taken from a published source. 
• State both the null hypothesis (H₀) and alternative hypothesis (H₁). 
• Describe your proposed plan for data collection (and if you have already started, 
share your progress). 
• Must show evidence of how you have made use of the (AI chatbot??) to support 
your learning and progress thus far (e.g. understanding your chosen claim, 
developing/checking your hypotheses, and/or planning your data collection, etc). 
• Be ready to explain and justify your choices / decisions when asked by your tutor. 
This interim check is worth 4% of the module grade. It ensures that you are on the right 
track before completing your final video presentation. 
 

## PDF page 2

Use of Generative AI for this Assignment 
➔ AI Assessment Scale permitted: Level 3 – AI Collaboration 
You are expected to use the designated AI learning tool to support your learning and 
progress in this assignment, but the decisions made, Excel work, interpretation of 
results and final video presentation must reflect your own understanding. 
When using Generative AI:  
• AI should support your thinking, not replace it. 
• Ensure that your submitted work reflects your own understanding. 
• You must be able to explain and justify your work. 
• Use AI responsibly by checking its accuracy and protecting your privacy. 
• And finally, declare your use of AI (via Declaration of Originality Form and Use of 
Generative AI (EM2) on LMS when submitting your video presentation) 
 
 
 
 
 
 
 
This 
Assignment 

## PDF page 3

Component 2: Video Presentation (8%) 
Rubrics (for students’ reference) 
Category Marks Exemplary 
3 marks 
Proficient 
2 marks 
Basic 
1 mark 
Needs Improvement 
0 marks 
Explanation of 
Hypothesis 
Testing 
3 Makes the correct 
decision/conclusion 
based on all parts of 
Excel results 
presented. 
 
Explains findings in 
clear and logical 
language. 
Two of the three 
elements are 
correct and well 
presented. 
Only one 
element is 
correct and well 
presented. 
None of the elements 
are correct or well 
presented. 
Spreadsheet 
Formula 
Demonstration 
3 Correctly applies 
and explains Excel 
formulas for mean, 
standard deviation, 
test statistic, p-
value, and CI.                     
Several 
formulas 
correctly 
applied and 
explained. 
Only a few 
formulas 
correctly applied 
and explained. 
None of the formulas 
correctly applied or 
explained. 
Approach & 
Reasoning 
2 2 marks 1 mark 0 marks 
Clear and accurate 
justification of 
dataset choice, test 
selection (t/z), and 
CI interpretation. 
Some mistakes 
but overall 
reasoning is 
present.            
Major mistakes 
or missing 
reasoning. 
Wrong approach 
and/or no reasoning 
presented. 
 
Your video presentation is expected to cover the following: 
Part 1. Identify a Claim 
Select a real-life scenario from an online news portal (e.g. Straits Times, CNA, Today 
Online), online publication (e.g. Mothership, 8days), or any other credible source. 
• The claim must mention a population mean (a numerical value).  
This reported value will serve as the basis for your assignment. 
• Show the source of the claim at the beginning of your video presentation. 
(e.g. screenshot or actual view of the article or webpage, briefly <5 seconds) 
 
Refer to the two examples below (not to be re-used by any student): 
Example 1  
Claim: Post-secondary students receive $14 pocket money a day in Singapore 
Source: Straits Times (Online) [Published: May 26, 2024] 
URL: How much pocket money do Singapore children get? It's $4 to $14 a day | ST 
Example 2 
Claim: Singapore teenagers spend 8.5 hours a day on their devices 
Source: Channel NewsAsia – Institute of Policy Studies survey [Published: Feb 4, 2025] 
URL: Singapore teenagers spend nearly 8.5 hours a day on screens: CNA-IPS survey 

## PDF page 4

Part 2. Define your Hypotheses 
• Clearly state both the null and alternative hypotheses. 
• Explain your reasoning for stating the alternative hypothesis. 
• For this assignment, use a two-tailed test.  
 
Part 3. Collect your Data 
• Obtain a random sample of at least 30 data points (or more). 
• Briefly explain why your sample is suitable for testing the claim. 
• You must collect data yourself. 
(e.g. oral survey, paper-and-pen survey, Google / MS Forms, etc.) 
 
Part 4. Using a spreadsheet application (Microsoft Excel) 
You must show and briefly explain the formulas used for: 
• sample mean and sample standard deviation 
• population standard deviation  
(applicable if your source provides this information) 
• test statistic and p-value 
• margin of error and confidence interval 
 
Tip: The partial screen-capture below shows part of a presentation. When showing 
evidence for Sample Standard Deviation, the cell is clicked to reveal the formula used.  
1) For ‘show’: Click on the cell containing the calculated component.  
2) For ‘briefly explain’: To calculate the sample standard deviation for the 31 data 
points collected, we use Excel formula STDEV .S from cell A4 to cell A34. 
 
 
 
 
 
 
 
1) Cell is clicked 
2) Formula used is 
revealed (after cell 
is clicked, then 
briefly explain. 
AY26/27 October semester 

## PDF page 5

Part 5. Carry out the Hypothesis test (with conclusion) 
• State whether you are using a t-test or z-test, and explain why. 
• Use your Excel results to conclude if there is sufficient evidence or insufficient 
evidence to reject the claim at a 5% significance level.  
• State your conclusion in a clear and logical manner. 
 
Part 6. Construct and interpret the 95% Confidence Interval 
• Use your earlier calculations to construct the interval. 
• Interpret what this interval says about the claim in a clear and logical manner 
such that someone unfamiliar with statistics would understand. 
- End -