MATD 0365 into MATH 1342:
Assignment using StatsPortal.
The four parts of this assignment is meant to get you prepared to succeed this semester. It is suggested you work on a few problems each day. If you wait until the last minute this could be avery overwhelming assignment. Keep in mind the Part IIIwill probably be the most time-consuming. We will still have regular homework on the new material due on Tue. Jan 24 and Tue. Jan 31. It is important that you attempt all of the problems in this assignment before school begins so that you know what help you need to arrange after classes begin.
You will probably need to read sections in the chapters for a refresher on some of these topics. You are to check the answers for Parts I and III as they are all provided in the software. If you didn’t get an answer correct, write down some questions you need to ask in class on the first day or in office hours during the first week. Make your questions clear enough that you will remember what you were thinking when you look at it a week later.
Part I: “Check your skills(At the end of each chapter, right before the Exercises section)
This part consists of several short, multiple-choice questions. All answers are available, so you will need to show your calculations or give a brief written explanation to back up your choice using complete sentences.
Assigned Problems (17 total):
1.15, 1.22, 2.15, 2.17, 2.19, 2.24, 4.14, 4.15, 4.20, 4.23 (use CrunchIt), 5.20, 5.21,
5.26 (use CrunchIt), 6.8, 6.10, 6.12, 6.14
Spend 3 minutes in your group on Tue Jan 17 deciding five questions to discuss from this, and then 15 minutes discussing those five questions. Turn in final version of your work Thur. Jan 19.
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Part II: StatTutor and Statistical Videos No specific time allotted in class to discuss these. Turn in final version of your work Thur. Jan 19.
(Tools in the “Resources” section of StatsPortal; choose one of these tools from the drop-down menu then select the Chapter and find the items listed below)
Find the videos listed at the top of the next page in StatsPortal under Resources > StatTutor. They are videos or animated power points of important concepts we have covered. They are only 2 – 7 minutes in length. Choose at least three to watch (at least one of each type and from at least two different chapters) and write down which three you watched and a brief description of each (2 – 3 sentences).
You might find it useful to watch many of these! They do require audio, so you may need to wait until the Learning Labs open the first week of school if you do not have internet at home or headphones to use in a public internet venue. The Learning Lab has headphones.
Chapter / StatTutor / Statistical Videos1 /
- “Individuals and Variables”
- “Exploring Pictures for Quantitative Data: Example A” and “Example B”
2 /
- “Choosing Measures of Center and Spread”
- “Summaries of Quantitative Data”
4 /
- “Displaying Relationships: Scatterplots”
- “Facts About Correlation”
5 /
- “Least-Squares Regression Line”
- “StatClips: Examples: Regression – Introduction and Motivation, Example B” and “Example C”
8 /
- “How to Sample Badly”
- “Simple Random Sample”
- “Snapshot: Types of Studies”
- “Snapshot: Experimental Design”
9 /
- “The Logic of Randomized Comparative Experiments”
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Part III: A Refresher on Exact Mathematical Models. No specific time in class allotted to discuss this. Discuss with teacher in office hours on Tue Jan 17 or Thur. Jan 19 (but not Tue. Jan 24.) Turn in final version of your work Thur. Jan 26.
(Using two points to write an equation of a line; then answering questions using the line.)
Phones used to be simple. People had home phone lines and had to pay extra for each minute of long-distance they talked. Suppose in 1985, a family had a phone bill of $35.49 for a month where they talked long-distance for 45 minutes, and a phone bill of $27.99 for a month where they talked long-distance for 20 minutes.
a) Find the equation of the line to predict the monthly bill from the number of long-distance minutes talked.
b)Interpret the slope in the context of the problem. (What does this number tell us?)
c)Interpret the y-intercept in the context of the problem. (What does this number tell us?)
d)Is this a proportional model or not? Explain your answer.
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Part IV: Book Exercises
Turn in final version of your work Thur. Jan 26.
(from the Exercises sections at the end of each chapter)
These are longer problems where you will need to show your work and write out any explanations, just like in Part I. Brief answers are provided in the book, but you will usually need to write a more complete solution and show more calculations.
Assigned Problems (11 total):
1.23, 1.30, 2.25, 2.30, 2.43 (make the histogram first, then choose either the Five-Number Summary or Mean & Standard deviation; use CrunchIt), 4.35 (“a” by hand, “b” on CrunchIt),
5.35 (use CrunchIt), 5.29, 8.33, 8.37, 9.49
Guide for answers not provided in book:
1.30: Skewed right, range is from 0 to 8 servings, center is 2 or 3 (median is 2). 35% ate fewer than 2 servings
2.30: Q1 = 1, M = 2, Q3 = 4 (Hint: picture the 74 data values written in a list from lowest to highest. The median would be in between the 37th and 38th data value, which are both “2”.)
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