Devry MATH221 All Weeks Discussions Latest 2019 JULY

MATH221 Statistics for Decision Making

Week 1 Discussion

DESCRIPTIVE
STATISTICS

If you were
given a large data set, such as the sales over the last year of our top 100
customers, what might you be able to do with these data? What might be the benefits
of describing the data?

Alternative:
Look for examples of descriptive statistics in the news or on websites. Then post a link to that publication or site,
note the statistic used and determine if it was an appropriate use of that
statistic.

MATH221 Statistics for Decision Making

Week 2 Discussion

PROBABILITIES
IN REAL WORLD

Look online
and find an article published within the past 4 weeks that includes a reference
to probabilities, means, or standard deviations. These articles might be discussing weather events,
investing outcomes, or sports performance, among many other possible topics.

Your first
post should include a summary of the article and what numbers you are
highlighting from that article. Also
include a link to the actual article. In
your replies to other students, describe specific decisions that the statistic
might influence and whether a different statistic might be more appropriate.

MATH221 Statistics for Decision Making

Week 3 Discussion

DISCRETE
PROBABILITY VARIABLES

For this
discussion you will use technology to create a short 1-2 minute multimedia
post/presentation.

Suggestions:
Narrated PowerPoint, recorded video (.mp4), Screencast-O-Matic (.mp4), or a
similar tool of your choice. Video can be recorded directly within a post as
well, but make sure to plan out in advance what you are going to say/show.
There should be a visual component as well as audio, so if you are using a
webcam for the video that only shows you speaking, please attach your
PowerPoint slide(s) (or screenshot images of them) to the post as well so
everyone can see them.

In your
short presentation, you will be describing an example that uses discrete
probabilities or distributions. Provide an example that follows either the
binomial probabilities or any discrete probability distribution, and explain
why that example follows that distribution. In your responses to other
students, make up numbers for the example provided by that other student, and
ask a related probability question. Then show the work (or describe the technology
steps) and solve that probability example.

For more
information about Narrated PowerPoint, access the Student Resources section of
Course Resources under the Introduction & Resources module heading, and
look for the heading that corresponds to the tool you want to use. For all
media posts in this course, please include a brief written synopsis to inform
your classmates what the main point or purpose is that the linked, attached, or
embedded media addresses.

MATH221 Statistics for Decision Making

Week 4 Discussion

INTERPRETING
NORMAL DISTRIBUTIONS

Assume that
a population is normally distributed with a mean of 100 and a standard
deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or
more? Why or why not?

MATH221 Statistics for Decision Making

Week 5 Discussion

CONFIDENCE
INTERVAL CONCEPTS

Look in the
newspapers, magazines, and other news sources for results of a survey or poll
that show the confidence interval, usually shows as a +/- some amount. Describe the survey or poll and then describe
the interval shown. How does knowing the
interval, rather than just the main result, impact your view of the results?

MATH221 Statistics for Decision Making

Week 6 Discussion

HYPOTHESES
IN THE REAL WORLD

Consider a
business of any type. What is a
situation where a hypothesis test might help make a decision? Describe the situation. Then you or someone in a reply can make up
numbers for that situation and someone else can solve it.

MATH221 Statistics for Decision Making

Week 7 Discussion

REGRESSION

Suppose you
are given data from a survey showing the IQ of each person interviewed and the
IQ of his or her mother. That is all the information that you have. Your boss
has asked you to put together a report showing the relationship between these
two variables. What could you present and why?