Summary
Summary STK110-TUTORIAL 3
- Course
- Institution
- Book
hi, with these past papers, it will guarantee you a distinctions with lots of practice!!!!!!!!
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
STK 120-SEMESTER TEST 1 2022 (MEMO)
-
TUTORIAL 7 MEMO
-
TUTORIAL 8A MEMO
Seller
Follow
thembisilemagudulela
Content preview
STK110 Preparation sheet: TUT 3 2023Question 1 is based on the following information:
Suppose we are interested in investigating the difference between weeknight hours slept for two
generations. A random sample of 40 Y-ers (Generation Y’ers (Millennials): Born: 1980 – 1995) and 20 Z-
ers (Generation Z’ers: Born: 1996 →) were asked the number of hours they sleep on a randomly chosen
weeknight (minutes were converted to a fraction of an hour). The results are summarised in the following
back-to-back stem-and-leaf diagram:
Weeknight hours slept
Leaf unit = 0.1
Generation Y Generation Z
9 8 8 6 6 5 6
9 8 8 8 8 8 6 6 6 5 5 5 6 6 7
9 8 8 6 3 3 2 2 2 0 0 0 7 0 0 4 6 8 8 9
9 9 9 8 8 6 6 6 5 0 0 8 0 0 5 7 7 7 8 8 8
9 2
a) What is the modal number (mode) of hours slept on a typical weeknight for Generation Y?
b) Determine the 60th percentile of hours slept on a typical weeknight for Generation Y.
c) Using STAT-mode on your calculator, calculate the average and standard deviation hours slept on a
typical weeknight for Generation Z (2 decimals).
d) Determine the coefficient of variation for Generation Z (2 decimals).
e) Based on your answer from Question d and given that 𝑐𝑣𝑦 =13.52% (coefficient variation for
Generation Y), which generation has the lowest relative variability?
1
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 thembisilemagudulela. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.98. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
Recently viewed by you
