Interpretation of Probabilities

M07: Discussion Board – Interpretation of Probabilities

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Let’s say that the price for a monthly cell phone plan in the US follows a normal distribution with a mean of $62 with a standard deviation of $18. Calculate the z-score for the cost of your cell phone plan. Then write a few complete sentences to describe:

· What proportion of cell phone plans are below your cost?

· What proportion of cell phone plans are above your cost?

· Is your cell phone plan considered unusually expensive or inexpensive? (Hint: find the middle 90% of observations)

M08: Discussion Board – Study Tips

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This week you should write up 3 study tips that you have used to study in the course or other math courses that have helped you be successful. You should talk about things that you think would be most useful to your peers. It would be recommended that you look through your classmates’ responses this week as there are probably many great ideas for studying.

If you need some ideas about effective test taking strategies and studying for tests you can find some great videos on that topic here (Links to an external site.)Links to an external site..

Example:

Study Tips:

  1. My main study tip I have used for this course that has helped me be successful is to write down each question to go back and study and write out problems that I need to so I can follow my steps to see how I figured out a problem and get the technique down.

  2. I sit down and literally focus on homework only because the smallest distraction will make me want to stop doing it then I will be rushing to get it done last minute.

  3. Go over old quizzes to make sure you are ready for the final and midterm.

I recommend my classmates to start on the assignments Monday and Finish before the weekend so they can recover over the weekend and chill and then back to work so they will not over due it.

M12: Discussion Board – Type I and Type II Errors

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This week you learned about hypothesis testing. In particular, you learned about the types of errors that can (and will) occur. You learned the difference betweent type I and type II errors. For this discussion board, come up with an example of a hypothesis test that could be conducted. State the null and alternative hpothesis. Then state what it would mean to have a type I vs. a type II error in the given situation. Explain which you think is “worse” given the circumstances. An example is given below using “the boy who cried wolf”:

· Null hypothesis: Wolf is not present

· Alternative hypothesis: Wolf is present

· Type I error: The boy cries wolf when there is no wolf present (reject null hypothesis when null hypothesis is true)

· Type II error: The boy does not cry wolf when there is a wolf present  (fail to reject null hypothesis when alternative is true)

· Type II error in this case is worse because the people will not think that there is a danger when there actually is.

M15: Discussion Board – Study Tips Repeat

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This week you should write up 3 study tips that you have used to study in the course or other math courses that have helped you be successful. You should talk about things that you think would be most useful to your peers. It would be recommended that you look through your classmates’ responses this week as there are probably many great ideas for studying. You have done this once already so think back to how what you said and read last time helped on your Midterm and make some adjustments for your plans to study for your Final.

If you need some ideas about effective test taking strategies and studying for tests you can find some great videos on that topic here (Links to an external site.)Links to an external site..

M16: Discussion Board – Exit Survey

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We care about what you think! Tell us about your experiences in this course…

· What did you like about the course?

· What did you NOT like about the course?

· What would have helped you be more successful?

· What have you learned about yourself as a student?

· What improvements can be made to improve this course for future students?

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