Devry MATH221 Week 2 Discussion Latest 2021 June

MATH221 Statistics for Decision Making

Week 2 Discussion

Probabilities

In these discussions, exploration is encouraged!

Each week you must post 3 times (details below):

(Required) Create and post a response that fully answers one of the 10 questions below (no later than Wednesday)

(Required) Create and post a response that fully answers a different one of the 10 questions below (on a different day)

(Required) Post one quality response to another classmates' "main" post or to a professor post (by the end of the week).

(Required) The posts must be submitted on at least 3 different days.

(Optional) Additional posts and/or days of participation are not required, but are certainly welcome!

NOTE: Always paste the question itself (and its number) above your answer (or enough of it, when it's a really long question, to make it clear which one you are addressing).

For full posting guidelines, review the Real World Discussions: Requirements page.

1. Contingencies

1. Create a contingency table with two variables.  Then pose two conditional probability questions for others to solve.  Here is an example (do not use this one).  Other students can reply with details on how to find the conditional probabilities.

What is the P(blue|medium)?

What is the P(small|green)?

2. Frequency Distribution 1

2. Use the following frequency distribution to determine the P(x<2) and P’(x<2).  Please note that these are complements of each other.  Describe your thought process and/or show work!

 3. Real-Life Probability Example

3. Give an example of a probability distribution in your home life or in your career.  Is this used directly or indirectly, such as what protein to make for dinner?  Provide the example and an estimate of the probability distribution.

4. One Event... Impacts Another?

4. How might the occurrence of one event in your life or career impact the probabilities of another event?  Are these events independent or dependent?  Why?

5. Probability for Quality Control

5. Thinking of a manufacturing company, how might probability be a part of their quality control?  Which companies might consider more outcomes as “unusual” based on the sensitivity of what they produce?  Why?

6. Frequency Distribution 2

6. Use the following frequency distribution to determine the P(1 < x < 4) and P(1 ≤ x ≤ 4).  Describe your thought process and/or show work!

7. Frequency Distribution 3

7. Use the following frequency distribution to determine the P(x < 0) and P(x ≥ 3).  Describe your thought process and/or show work!

8. Probability Distribution in the News

8. Find an example of a probability distribution in the news.  Why was this presented?  What decisions might it impact?

9. Ethics! (Misinterpretation?)

9. Ethics:  Find an example of a probability in the news that might be misinterpreted by the reader.  How might it have been presented more directly, or in a way that would lead to less misinterpretation?

10. Ethics! (Reasonable?)

10. Ethics:  Find an example of a conditional probability in the news.  Was the occurrence of the first event reasonable?  Why or why not?