Exam (elaborations)
STA2023 Quiz 4 EXAM QUESTIONS 7 TERMS WITH VERIFIED DEFINITIONS UPDATED 2024
- Course
- Institution
STA2023 Quiz 4 EXAM QUESTIONS (7 TERMS) WITH VERIFIED DEFINITIONS UPDATED 2024
[Show more]
Seller
Follow
Academik001
Reviews received
Content preview
STA2023 Quiz 4 Study Guide Questions andCorrect Answers
1). At uf, there are always a few days between the end of classes and the beginning of final
exams. these days are meant as a study period, but some students would prefer to take the
exams as soon as possible, to have a longer vacation - in fact, some students even leave
gainesville during those days as a mini-vacation. to see if the student body supports
abolishing "dead week", the student government decides to conduct a survey. they conduct a
phone survey (with local numbers selected at random from the student directory) calling
people during "dead week". will this sample be representative of all uf students?
Ans: No, since not all students have local phone numbers.
2). The cost of tuition is a very important topic. the alligator surveyed 500 randomly selected
students and asked them if they supported a 5% tuition increase. what kind of study is this?
Ans: Survey
3). A high positive correlation is found between college students' age and their gpa. however, if
one student aged 44 with a high gpa is omitted from the study, the correlation all but
disappears. this is an example of:
Ans: influential outlier
4). Suppose that you recorded the number of television sets per person and the average life
expectancy for the world's nations. there is a high positive correlation: nations with many tv
sets have higher life expectancies.
Ans: The response variable is: the nation's life expectancy, in years
The explanatory variable is: the number of TV sets per person
The experimental units are: the nations
The lurking variable that acts as a confounding factor in this study is: the nations' wealth
5). A survey asks participants if they support or oppose the building of new football stadium. if
there are 80 respondents (selecting using a simple random sampling method) to a survey,
what is the approximate margin of error?
Ans: 0.1118
PaperStoc.com Page 1 of 2
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 Academik001. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62491 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now