Essay
Descriptive Stats and Shape of Distn-
- Course
- Institution
Descriptive Stats and Shape of Distn-
[Show more]
Seller
Follow
affrinahmbete2003
Content preview
MATH 1342 Name___________________________
Elementary Statistical Methods
Lab Ch.3 – Descriptive Statistics and the Shape of Distributions
Critical Thinking; Communication Skills; Empirical/Quantitative Skills
1. During our semester in statistics, we will be studying inferential statistics. In chapter 1,
we learned the basic premises behind inferential statistics. Write a sentence or two
summarizing inferential statistics in your own words.
The process of applying sampled data to infer or forecast characteristics of a larger sample data
set or population is known as inferential statistics. The several methods that statistics obtained from
observations on samples from research populations may be utilized to infer whether or not such
populations are genuinely distinct from one another are referred to as inferential statistics.
2. The inferential statistics that we will cover in our class will all be parametric statistics.
Parametric statistics require that certain requirements about the distribution must be met by
the sample data values. We have learned some different distributions in chapter 2. Sketch
and name the FOUR different distributions that we have learned.
Normal distribution - the normal distribution, often
referred to as the Gaussian distribution, is a symmetric probability
distribution about the mean that indicates that data close to the
mean occur more frequently than data distant from the mean. The
normal distribution is represented graphically as a "bell curve".
Binomial distribution A statistical probability distribution
known as a binomial distribution indicates the possibility that a given
value would take one of two independent values under specific
conditions or presumptions.
, MATH 1342 Name
___________________________
Elementary Statistical Methods
Lab Ch.3 – Descriptive Statistics and the Shape of Distributions
Critical Thinking; Communication Skills; Empirical/Quantitative Skills
Exponential distribution the probability density function is
plotted on an exponential distribution graph, which displays the
distribution of the time or distance between events. Lambda (λ) and
x are the two terms utilized in the exponential distribution graph. In
this case, x stands for time, and lambda for the number of
occurrences per unit of time.
Poisson distribution The Poisson distribution is
a type of discrete probability distribution that represents
the likelihood of a specific number of events taking place
within a predetermined time frame, provided that these
events occur at a constant mean rate and without regard
to the elapsed time since the last occurrence.
3. We have also learned that the mean and the median can give us hints about the
distribution of our data. Explain how the different distributions typically affect the mean and
the median. Be certain to include the words “resistant” and “non-resistant” in your
explanation.
In a normal distribution, the mean and median are equal. Both are at the center of the
distribution. This is the average value when the data is sorted. Because the normal distribution is
symmetrical, the median line is also in the center. The mean and median are resistant to outliers in a
normal distribution.
The mean of the binomial distribution is affected by the probability of success and the number
of trials. It is not always located at the distribution center.
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 affrinahmbete2003. 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)
72964 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now