Exam (elaborations)
Summary Statistics 1.
- Module
- EDPNA - technical
- Institution
- EDPNA - Technical
Summary Statistics 1.
[Show more]
Seller
Follow
Content preview
Summary Statistics 1Standard Deviation - correct answer-The average distance that each value in a data set is
away from the mean
Variance - correct answer-Average squared deviations from the mean
Range - correct answer-The difference between the maximum value and the minimum value
of a data set
What does a low standard deviation indicate about a data set as opposed to a high standard
deviation? - correct answer-A low standard deviation indicates the values in a data set tend
to be relatively close to the mean. A high standard deviation indicates the values in a data
set are spread out over a larger range.
What is the standard deviation of a data set in relation to its variance? - correct answer-The
square root of the variance
Quartile 1/Lower Quartile (Q1) - correct answer-The 25th percentile of a data set
Quartile 3/Upper Quartile (Q3) - correct answer-The 75th percentile of a data set
Interquartile Range (IQR) - correct answer-The middle 50% of a data set; calculated by
finding the difference between the first and third quartiles
Describe the "IQR method" for identifying outliers. - correct answer-• Low outlier < Q1 -
1.5(IQR)
• High outlier > Q3 + 1.5(IQR)
Describe the "standard deviation method" for identifying outliers. - correct answer-An outlier
is a value located 2 or more standard deviations above or below the mean
Measures of Center - correct answer-• Mean
• Median
• Mode
Measures of Spread - correct answer-• Range
• IQR
• Variance
• Standard deviation
What does it mean to shift a data set? - correct answer-Adding or subtracting a constant
from all values in the data set
What does it mean to scale a data set? - correct answer-Multiplying all values in the data set
by a constant
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 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 modockochieng06. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now