Exam (elaborations)
Stat 101 Exam Questions And Answers Latest Update
- Course
- STAT 101
- Institution
- University Of Pennsylvania
Stat 101 Exam Questions And Answers Latest Update
[Show more]
Content preview
Solution 2024/2025Pepper
Stat 101 Exam Questions And Answers Latest
Update
Shifting ANS✔✔ the process of adding or subtracting a constant from every
value of a quantitative variable
rescailing ANS✔✔ the process of multiplying or dividing all the values of a
quantitative variable by a constant
standarizing ANS✔✔ The process of determining the number of standard
deviations every variable from a quantitative variable is away from its mean
value
z-score ANS✔✔ found by subtracting the mean value from the observation
and then dividing the standard deviation. z-score is just a number, it has no
units
normal distribution ANS✔✔ symmetric, uni-modal and bell-shaped
With what is a normal distribution described? ANS✔✔ mean and standard
deviation
standard normal distribution ANS✔✔ has a mean of 0 and a standard
deviation of 1
, Solution 2024/2025
Pepper
68% ANS✔✔ of observations from a normal distribution are within 1
standard deviation of the mean
95% ANS✔✔ of observations from a normal distribution are within 2
standard deviations of the mean
99.7% ANS✔✔ of observations from a normal distribution are withing 3
standard deviations of the mean
μ ANS✔✔ population mean
ŷ ANS✔✔ sample mean
σ ANS✔✔ population standard deviation
s ANS✔✔ sample standard deviation
normal probability/quantile plot ANS✔✔ used to see if the distribution of a
quantitative variable follows a normal distribution
population ANS✔✔ the people you want to get data from, not the sample. So
the general population. If a study were looking at brown haired adults in the
us with a sample of 1,000 us adults, the population would be all us adults
sample ANS✔✔ the portion of the population you're actually testing
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 Schoolflix. 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)
73918 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now