- Welcome to Math 220. I look forward to a great semester.
- ClassData1
- ClassData2
- ClassData3
| September 9 |
- Read Section 1.1, pages 6 - 17.
- Starting on page 22, do problems 17, 20, 21, 24 (for the COMPARATIVE plot, first trim, which means round to the nearest ten, and then split the stems), 28(a,b), 37, 41
- Complete the stemplot of the baseball data from class. For this data, also make a histogram that is more descriptive than the one I put on the sheet. You'll need to change the class intervals.
- Go here and look
for the histogram "Major League Baseball Hitting Streaks." This is a cool data set, but unfortunately we don't know how many data points
it contains. Histograms are most useful when there's lots of data or if the data is messy. This data set satisfies neither of these conditions. Find the specific data set (use
Google if you want). Then make either a stemplot or dotplot, whichever is most useful, and explain why you chose this graph.
Read the entire article if you want. The idea is interesting.
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| September 11 |
- Finish the Histogram Fathom lab. Turn it on on Tuesday.
- Here are a few more histogram problems.
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| September 16 |
- Read pages 30 - top of 34.
- Find the mean, median, and mode of the data set in 1.60 on page 49. Also make a dotplot for this data set. Which measure of center is best?
- Look at the data in 1.61 on page 49. Round each data point to the hundreds place. Make a stemplot for the data. Compute the mean, median, and mode of this data set. Which measure of center is best?
- Study another measure of center, called the "trimmed mean," by doing problem 1.97 on page 53. Is the trimmed mean resistant?
- Starting on page 49, do 65, 66(a), 67, 68, 69 (use the scale model for the mean), 86
- In a data set with 356 points, what is the median? Take the largest data point and change it so that the median is now different. How could the data point change?
- Work on finding the median and mean for the example we did at the end of class.
- Do these exercises about the center of a data set.
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| September 18 |
- Read pages 34 - top of 40.
- Starting on page 48, do 56, 62, 64, 82-84, 87, 95
- Do these exercises about the variation of a data set.
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- Today's quiz covers the homework and classwork from 9/3, 9/9, and 9/11.
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| September 23 |
- Finish today's Fathom lab. Turn it in on Thursday.
- Read the bottom of page 40 - 44, and pages 53 - 62.
- Make sure you can use your calculator to find mean, median, mode, quartiles, range, standard deviation
- For each of the 3 groups in problem 80 on page 51, find 4 measures of variation: range, IQR, MAD, and standard deviation. Do these measures rank the 3 groups the same regarding amount
of variation? Which measures are most appropriate?
- Starting on page 52, do 89, 90(No need to do the calculator part, but should the answer always be 1?)
- Starting on page 73, do 114-117, 126-129
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- Today's quiz covers the homework and classwork from 9/3, 9/9, and 9/11.
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| September 25 |
- Use your calculator to do the monopoly activity on the class handout. For this data, make a scatterplot by hand.
- Read most of chapter 2: pages 83 - top of 92; 101 - 105; 108 - 119. (When reading, ready for an understanding of the concpets, not an understanding of the nitty-gritty formulas. We'll discuss
these on Tuesday.)
- Starting on page 95, do 6 (use calculator to find r), 9, 25
- Starting on page 106, do 34 (use calculator for b), 35, 38 (use calculator for b), 41, 44, 47, 50
- Starting on page 122, do 57, 58 (use calculator), 62, 68 (use calculator in b)
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- Today's quiz covers the homework and classwork from 9/16 and 9/18.
- The directions and data for your SAT report can be found under the "Report" link on our class webpage.
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| September 30 |
- Study for Thursday's exam.
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| October 2 |
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| October 7 |
- Suppose one bag has 1 red marble and 2 blue marbles. Anothre bag has 4 marbles, some red and some blue. What are the possible color breakdowns in the second bag that would make a game of SNAP fair?
- Suppose one bag has 1 red marble and 2 blue marbles. Anothre bag has 3 marbles, some red and some blue. What are the possible color breakdowns in the second bag that would make a game of SNAP fair?
- If you have two bags and each bag has two different colored marbles, when is SNAP fair? (We started a derivation in class . . . )
- Read pages 237 - 241, 242 - 255.
- Use Table B to simulate 4.7 on page 242 (do 50 shots instead of 100 if you prefer). Then do this problem again, but suppose that Shaquille makes each shot with probability .6.
- Starting on page 255, do 21, 23 (in c they did not say the die is "fair"), 25, 27, 28-30 ,34, 36, 43 (draw a small tree diagram), 44 (draw a small tree diagram)
- Here are a few more homework problems.
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| October 9 |
- Read pages 289 - top of 298, page 302 about independence
- Starting on page 255, do 28-30, 34, 36, 39, 43 (draw a small tree diagram), 44 (draw a small tree diagram)
- Starting on page 303, do 101-103, 112-115 (your Venn diagram will have 3 overlapping circles)
- Do 146 on page 309.
- You take a ten-question, multiple choice quiz. Each question has 4 possible answers and you randomly guess. What is the probability that you get all questions right? What is the probability
that you get all questions wrong? What is the probability that you get exactly 1 question right? What is the probability that you get at most 2 questions right? What is the probability that you get at least 2 questions right?
What is the probability that you get question 1 right and question 10 wrong?
- Use your calculator to do the examples on page 318-319
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| October 14 |
- Read pages 258-262, 270-272, 279-280, 314-320.
- Starting on page 267, do problems 49, 51, 56, 57, 58, 59 (what's the error in b), do 59 again when you thing of W as a binomial random variable - do the problem by hand and with your calculator,
60
- Starting on page 286, do problems 72, 75, 77, 83
- Finish the Binomial problems from the class handout.
- A library subscries to two weekly magazines. They arrive on W, R, or F. They arrive independently of each other. For each, P(W) = .4, P(R) = .5, and P(F) = .1. Let Y = number of days beyond Wednesday it takes both magazines
to arrive. Find the probability distribtuion of Y.
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| October 16 |
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| October 21 |
- Read pages 58- top of 68.
- Do the problem about footprints on the class handout.
- Starting on page 72, do problems 108, 109, 110, 114 (without Empirical Rule), 120, 122, 124, 130-132, 136, 139
- Here are a few more problems.
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| October 23 |
- Finish the Binomial approximation problems on from the class handout.
- Read pages 321 - 327.
- Starting on page 332, do 13, 15, 17, 28, 29
- Read pages 68 - 71.
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| October 28 |
- Just so you know, on either this Thursday or next Thursday, we will connect the binomial random variables we've studied with the Central Limit Theorem. Right now, the
two concepts mights seem disjoint, but they are not.
- Read pages 335-342.
- Starting on page 347, do problems 42, 44, 48, 49, 51, 53, 59
- Starting on page 350, do problems 66, 71, 75 (Do you need to be told that pH varies according to a Normal distribtuion?)
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| October 30 |
- Finish the Central Limit Theorem problems from the class handout.
- Finish the CLT Fathom lab.
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| November 4 |
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| November 6 |
- Do problems on the "Parameters and Statistics" class handout.
- Read pages 321 - 324.
- Starting on page 333, do 23, 24, 25.
- Here are a few more problems.
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| November 11 |
- Read pages 356 - 367.
- Starting on page 369, do problems 10, 18, 20, 23, 25, 31, 32
- Read pages 418 - 421.
- Starting on page 441, do problems 15, 24 (use the "data" feature on your calculator for t-intervals), 30, 31, 44
- Read pages 488 - 490.
- Starting on page 502, do problems 11, 12, 23, 26, 28, 32
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| November 13 |
- Finish the homework assigned on 11/11. Be able to find confidence intervals by hand and with your calculator.
- This quiz is due on Tuesday. You may use your book and notes, but you may not discuss it with other people. Since this quiz is practically a previously
assigned homework problem, some of you may have discussed it with people in the class. That's fine. Stop discussion on that particular homework problem at this point, however.
- Read pages 197 - 207.
- Starting on page 208, do problems 53, 56, 69 (good question), 72, 76
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- The next report is posted under the "Report" link
- Today's quiz covers the homework and classwork from 11/6.
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| November 18 |
- Read pages 372 - 390. Notice that this section assumes that sigma is known . . . thus the z test statistic.
- Starting on page 391, do 50-51, 53, 55, 56, 60, 61, 62, 68 (by hand and calculator), 70
- Read pages 422 - 428. Notice that his section assumes that sigma is not known . . . thus the t test statistic.
- Starting on page 441, do 20, 34 (by hand and calculator - use calculator/Fathom to find the statistics), 35 (by hand and calculator)
- Read pages 493 - 497.
- Starting on page 502, do 9, 14 (by hand and calculator), 22
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| November 20 |
- Starting on page 411, do 112, 115
- Read pages 428 - 431 about "Matched pairs t procedures"
- Starting on page 444, do 34 (hand and calculator), 41 (hand and calculator)
- Read pages 447 - 455 about "Comparing Two Means"
- Starting on page 467, do 61 (use calculator), 65 (use calculator), 69, 70, 71
- Read pages 505 - 508 and bottom of 511 - top of 515 about "Comparing Two Proportions"
- Starting on page 517, use your calculator to do 44, 46, 51
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| November 25 |
- Study for next Thursday's exam. The study guide will be posted soon.
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| December 2 |
- Study for next Thursday's exam. The study guide will be posted soon.
- Read pages 525-533 and pages 536 - 545. (Homogeneity is discussed on page 542 - the first model - and independence is
discussed on page 543 - the second model.
- Starting on page 548, do 10, 11, 12, 17, 21, 23
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| December 4 |
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