A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | |
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1 | Paragraph or letter | Problem | Solution | Institution | Last Name | First Name | ||||||||||||||
2 | Winter 2025 | |||||||||||||||||||
3 | 1/6/2025 | Inv A | Stem before graph | Were 6 hurricanes in 2019 as shown in graph | Cal Poly | Chance | ||||||||||||||
4 | 1/5/2025 | PP B.C | One way to measure the variables is | One way to measure the variability is | Cal Poly | Chance | ||||||||||||||
5 | 1/7/2025 | Inv 1.2b | missing hint colon | Cal Poly | Chance | |||||||||||||||
6 | 1/9/2025 | PP B.C | Formula provided doesn't explain what the symbols represent | Clarify the x_i. Also clarifythat they don't need to calculate the value, just explain their reasoning | Cal Poly | Chance | ||||||||||||||
7 | 1/13/2025 | Inv 1.6 handy reminders | missing parentheses on help instruction | > iscambinomtest("?") | Cal Poly | Chance | ||||||||||||||
8 | 1/19/2025 | Inv 1.7 after g | missing "n" in E(X) | E(X) = n*PI | Cal Poly | Sabbag | ||||||||||||||
9 | 1/27/2025 | 1.11 JMP instructions | old instructions | Choose DOE > Sample Size Explorers > Power > Power for One Sample Proportion | Cal Poly | Sabbag | "Exact" is Clopper-Pearson. Null probability is assumed proportion. Can use pull-down menu to select Solve for Sample Size. | |||||||||||||
10 | 1/30/2025 | PP 1.3B | Confusing number of successes for Yukon (see also PP 1.2A) | Behaviorial cues: 6 out of 8, Communicative cues: 7 out of 8 | Central College | Mills | Mark | |||||||||||||
11 | 1/30/2025 | PP 1.4A(d) | Maybe a little re-wording here would help, since there isn't any "recall" from something previous | "Initially, 71 houses were sampled, and 8 had a lead content above 15 ppb." | Central College | Mills | Mark | |||||||||||||
12 | 2/3/2025 | Inv 2.2 | some editions have bad spacing after (c) and bad page break after (d) | Cal Poly | Chance | |||||||||||||||
13 | 2/3/2025 | Inv 2.2 | R version: overylay | overlay | Cal Poly | Chance | ||||||||||||||
14 | 2/4/2025 | Inv 2.2(k) | says use 4.25 as scale parameter | should be 1/4.25 | Cal Poly | Chance | ||||||||||||||
15 | ||||||||||||||||||||
16 | Fall 2024 | |||||||||||||||||||
17 | Investigation 1.3 | part (j) technology instructions | press Reset after generating the first sample result, before moving to the binomial distribution (update: applet will show exact binomial if only one sample has been generated) | BC | ||||||||||||||||
18 | Investigation 1.7(n) | teporting | reporting | BC | ||||||||||||||||
19 | Investigation 1.8 Prob Detour | small sigma symbols | BC | |||||||||||||||||
20 | Investigation 2.1 | Heading is off | Should reference Investigation 2.1 | |||||||||||||||||
21 | Practice Problem 3.6C | Lettering/Numbering off | First part (e) should be labeled (d) | BC | ||||||||||||||||
22 | Practice 4.2A | link display "links to external site" | ignore | BC | ||||||||||||||||
23 | Practice 4.5 | Part (c) refers to "inclue your input" | Should probably be "include your output" or both | BC | ||||||||||||||||
24 | ||||||||||||||||||||
25 | ||||||||||||||||||||
26 | Winter 2024 | |||||||||||||||||||
27 | Practice A.B answer | There are two parts c) and the second one seems to be the answer to d). Then change d) to e). There is no context to the problem. | add context. | AS | ||||||||||||||||
28 | 1.2 after (l) | bad page break in some versions | ||||||||||||||||||
29 | PP 1.4B | behavioral cue vs. communicative cue | probably switch to communicative cues (7 of 8); solutions show both for now. Also interchange order of questions a and b | |||||||||||||||||
30 | Discussion after m in 4.7 | Missing period after “transformed parameter” | ||||||||||||||||||
31 | Inv 4.8 intro | mu_nusic | mu_music | Design vs. study design in 4.8 | 4.3(h) missing space | |||||||||||||||
32 | Inv 4.10 R code | missing parentheses | to use "with" function | |||||||||||||||||
33 | Example 4.2 | same R output repeats | update 2nd R output to new df | |||||||||||||||||
34 | Ch. 4 summary | t-produces | t-procedures | |||||||||||||||||
35 | 2/2/2024 | Inv. 1.4 Technology Detour (Minitab) | Hypothesized proportion shown in screen shot of Minitab window doesn't match what is happening in the investigation | Change to 0.15, to match the investigation | Central College | Mark | Mills | |||||||||||||
36 | p. 187 R/JMP version | extra blank lines at top of page | ||||||||||||||||||
37 | Inv 3.7 | switches to 90% but still includes zero | might as well keep at 95% | |||||||||||||||||
38 | 3/18/2024 | Inv. 3.7(d) | Random variable X is not defined | Maybe you can/should define X in (d), just for clarity to know how to determine n, M, and N | Central College | Mark | Mills | |||||||||||||
39 | ||||||||||||||||||||
40 | Fall 2023 | |||||||||||||||||||
41 | Inv 3.6r | Explain you reasoning | ||||||||||||||||||
42 | Inv 3.9 | bad page breaks, (c) mis numbered | more space in j, (c) to (g) | |||||||||||||||||
43 | very end of discussion of 4.2 prob detour | should really be comparing the distribution of the standardized statistic to the t-distribuiton | use sampling distribution for t-statistic instead of difference in means | |||||||||||||||||
44 | 12/20 | PP 2.5C | observe mean | observed mean | ||||||||||||||||
45 | 12/21 | example 3.2 | definition of Black households | extra ( | ||||||||||||||||
46 | ch 3 summary R commands | missing ) | ||||||||||||||||||
47 | inv 2.7 | the10% | needs space | |||||||||||||||||
48 | 8/10 | Inv 1.4(m) | May not have enough space | Cal Poly | ||||||||||||||||
49 | 8/8 | Inv 1.6, paragraph before (g) | We will consider pi_0 a plausible for pi | We will consider pi_0 a plausible value for pi | Cal Poly | Palmer | ||||||||||||||
50 | 8/11 | Inv 1.10 summary box | z* in wald and adjusted wald formulas | more of a superscript | ||||||||||||||||
51 | 8/14 | PP 1.16C | extra ( | [Hint | ||||||||||||||||
52 | inv 1.14 summary box | z* and extra ) | ||||||||||||||||||
53 | 8/14 | Example 1.2 solution | (e) approximate; (f) We | approximation; we can enter | ||||||||||||||||
54 | 9/26 | PP 1.9A | The problem needs to have a stem to introduce the situation before having students do part (a). | Central College | Mills | Mark | ||||||||||||||
55 | 12/12/23 | Inv A | Still two ppm uses (including in graph) | Change to ppb | ||||||||||||||||
56 | 12/13/23 | Inv 2.7 | Definition of systematic sample "takes selects" | replace with "selects" | ||||||||||||||||
57 | 12/15/23 | Example 2.1 | subjects | subject's | ||||||||||||||||
58 | new PP 2.5C | can impact inv 2.6 (j) spacing | ||||||||||||||||||
59 | case 1 | total sample size squished | ||||||||||||||||||
60 | Example 3.1 | missing graph | ||||||||||||||||||
61 | R version - Rel risk summary | |||||||||||||||||||
62 | Winter 2023 | |||||||||||||||||||
63 | 1/13 | Inv 1.3 (k) | Not enough space for answer in JMP/R version | Cal Poly | Chance | Beth | ||||||||||||||
64 | 1/24 | Inv 1.8 (k) | subscriptions should not be plural? | or do the subscripts | ||||||||||||||||
65 | 1/27 | Inv 1.8 | Technology Detour One Proportion z-test R instructions | arguments for iscamonepropztest are observed, n, hypothesized, alternative, conf.level). See Summary box. | ||||||||||||||||
66 | PP 1.9A | Interchanged questions a and b but then the context isn't introduced before a | ||||||||||||||||||
67 | 2/2 | Inv 1.17 (b) | What symbols would you use | They are only asked about the percentage and don't want to encourage them to say phat = 25.4% | ||||||||||||||||
68 | 2/2 | Inv 1.17 (g) | With the updated data, the p-value is .03 so most don't like "very strong evidence" | Ask instead about "strong evidence"? | ||||||||||||||||
69 | 2/6 | Inv 2.1 | Awkward page break in JMP/R version (p. 124) | |||||||||||||||||
70 | 2/8 | iscamaddnorm | stray value appeared in output | removed the stray value, removed the grid, added options for adding x-label and/or title (myxlab and mytitle) | ||||||||||||||||
71 | 2/9 | iscamdotplot | couldn't add a main title | now can add a main title (mytitle) | ||||||||||||||||
72 | 3/1 | Inv 4.2 | Probability exploration | Spacing is awkward in several places | ||||||||||||||||
73 | 3/9 | PP4.5 | Shouldn't have skipped (a). Make sure the question about how they can use summary statistics/context to recognize the skewed nature of the distributions. | |||||||||||||||||
74 | 3/20 | Inv. 2.1 | I can't find anywhere in this investigation where it says that "birthweight" is in grams | Maybe add this as a parenthetical note in the first sentence of the second paragraph of the "Discussion" section? | Central College | Mills | Mark | |||||||||||||
75 | ||||||||||||||||||||
76 | ||||||||||||||||||||
77 | Fall 2022 | |||||||||||||||||||
78 | 9/13 | PP 1.3B | Incorrect data for Yukon | "6 of 8", not "7 of 8" | Central College | Mills | Mark | |||||||||||||
79 | 9/13 | PP 1.4B | Incorrect data for Yukon | "6 of 8", not "7 of 8" | Central College | Mills | Mark | |||||||||||||
80 | 9/13 | PP 1.4A (c) | Typo - "null and appropriate" | "null and alternative" | Central College | Mills | Mark | |||||||||||||
81 | 10/5 | PP 1.9A | Incorrect reference to PP 1.7B | Should reference PP 1.8B | Central College | Mills | Mark | |||||||||||||
82 | 10/5 | PP 1.9A(c) | It would be nice if the problem specifically asked students to calculate the margin of error for a 99% CI | Central College | Mills | Mark | ||||||||||||||
83 | 10/5 | PP 1.9A(a and b) | The order of these questions seems wrong. I always teach that students check the validity conditions first and then calculate an interval or run a test after they know the z-procedures are valid. (I tell them they should "look before they leap".) | Maybe just interchange (a) and (b)? | Central College | Mills | Mark | |||||||||||||
84 | 10/5 | Inv. 1.9(l) | The instructions for this part just references "these intervals" | It might be clearer to say "the intervals in (k)" | Central College | Mills | Mark | |||||||||||||
85 | 10/5 | PP 1.6(a) | Students don't seem to understand that the "trial and error" method they're supposed to use is what they just did in Inv. 1.6 | Maybe add the parenthetical "(like you did in Investigation 1.6)" after "trial and error" in the instructions | Central College | Mills | Mark | |||||||||||||
86 | 10/23 | Inv. 2.1 between (b) and (c) | Wrong number of rows | 305,536 | Central College | Mills | Mark | |||||||||||||
87 | 10/23 | Inv. 2.1(f) | 2016 is cited instead of 2020 | Central College | Mills | Mark | ||||||||||||||
88 | 10/23 | Inv. 2.1(m) | It might be good to specify that students use a histrogram of the birthweight data for overlaying the normal model. | Central College | Mills | Mark | ||||||||||||||
89 | 10/23 | Inv. 2.1 (n) | Wrong column in Calc > Calculator command | Should be C6, not C2 | Central College | Mills | Mark | |||||||||||||
90 | ||||||||||||||||||||
91 | Winter 2022 | |||||||||||||||||||
92 | 1/14 | Inv 1.7(j) | manger | manager | Cal Poly | Sabbag | Anelise | |||||||||||||
93 | 1/17 | Inv 1.8 | references phat but hasn't really been defined | Can define phat here or in Inv 1.5 | Central College | Mills | Mark | |||||||||||||
94 | 1/18 | Inv 1.8 after (s) | paragraph references Investigation 1.2 | Should reference Investigation 1.3 | Cal Poly | Sabbag | Anelise | |||||||||||||
95 | 1/31 | Inv 1.11 (e) | References second pull-down menu | Should be third pull-down menu | Cal Poly | Sabbag | Anelise | |||||||||||||
96 | 2/11 | Inv 3.1 (s) | missing period in question | Add period after distribution | Cal Poly | Sabbag | Anelise | |||||||||||||
97 | 2/15 | Inv 3.5 after l | applet instructions suggested selecting the Plot option | Should probably leave as the cards option | Cal Poly | Sabbag | Anelise | |||||||||||||
98 | 3/7 | PP 3.1B | No direction is given for Ha, reference is unclear | Reference PP 1.1B and consider specifying a direction (or allow either with justification) | Central College | Mills | Mark | |||||||||||||
99 | 3/18 | Inv. 2.1 (n) | Typo in Minitab calculator expression. | Second "std" should be "stdev" | Central College | Mills | Mark | |||||||||||||
100 | 3/18 | Inv. 2.1 (p) | Incorrect Minitab directions | I think "Single" should now be "Simple" (at least in my cloud version of Minitab) | Central College | Mills | Mark |