Exam (elaborations)
INTRO TO STATS EXAM SLCC QUESTIONS AND ANSWERS
- Course
- Institution
INTRO TO STATS EXAM SLCC QUESTIONS AND ANSWERS
[Show more]
Content preview
INTRO TO STATS EXAM SLCCQUESTIONS AND ANSWERS
Coefficent of Variation (CV) - Answer-Ratio of the standard deviation to the mean of
data set
Std. dev / mean
Higher CV = more spread
When converting units of measure, the CV is unchanged
Statcrunch = coef of var (displayed as percentage, don't forget to divide by 100)
Empirical Rule - Answer-For bell-curve data
68% of data within 1 std dev
95% within 2 std dev
99.7% within 3 std dev
sample standard deviation - Answer-s
Statcrunch = std dev
population standard deviation - Answer-σ (sigma)
Statcrunch = unadj. std. dev
Random sampling - Answer-a sample that fairly represents a population because each
member has an equal chance of inclusion
ex: pull #'s out of hat
Systematic sampling - Answer-randomly select some starting point and then select
every kth element in the population
ex: 5th customer to come out of store and then every 7th after that.
stratified sampling - Answer-A type of probability sampling in which the population is
divided into groups with a common attribute and a random sample is chosen within
each group
homogeneous, non-overlapping strata
Ex: freshmen, soph, juniors and seniors could be strata
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 biggdreamer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. 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