Exam (elaborations)
Summary Statistics
- Course
- Institution
Exam of 2 pages for the course Chapter 4 - Summary Statistics at Chapter 4 - Summary Statistics (Summary Statistics)
[Show more]
Seller
Follow
topgradesdr
Reviews received
Content preview
Summary StatisticsWhat data characteristics are necessary to summarize quantitative data? - correct
answer-The Center of the set measurements, or the value that the data tend to cluster
around.
The variability (dispersion) of the set of measurements (how spread out the data are).
What is a measure of central tendency? - correct answer-Helps describe the location of a
majority of values that is normally somewhere around the middle range of observed values.
What are the measures of variability? - correct answer-An indication of the spread of the
measurements around the center of a distribution.
What are low variability data? - correct answer-Low dispersion, or concentrated around the
center of a distribution of data.
What are high variability data? - correct answer-High dispersion, or data that are very spread
out.
What is a parameter and why can't we normally calculate them? - correct answer-It is a
numerical summary of a population, but hard to calculate completely because of the sizes of
populations.
What is a statistic? - correct answer-An estimate of a population parameter
statistics are calculated from data that have been sampled from the population of interest.
What are three measures of center? - correct answer-mean, median, mode
What is the mode? - correct answer-the most frequently occurring value in a set of data.
Amodal data has no mode.
What is the mean? - correct answer-the average of all the values in a dataset
What is the median? - correct answer-the value halfway through an ordered data set, or the
50th percentile of a set of data
How do you find the median of a dataset? - correct answer-Data must be ordered from
smallest to largest.
If the number of values in the dataset is odd, the median is the number located in the exact
middle of the list.
If the number of values in the dataset is even, the median is found by computing the mean of
the two middle numbers.
How do you determine if the outlier is influential on measures of center? - correct
answer-Calculate the difference in mean between the set including the outlier and the set
excluding the outlier.
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 topgradesdr. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83637 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now