Stats
5th Edition
ISBN: 9780135163825
Author: De Veaux, Richard D., Velleman, Paul F., BOCK, David E.
Publisher: Pearson,
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Chapter 10, Problem 3E
To determine
Explain the difference between the proportion of respondents who are the first attenders and the proportion of the entire student body that are first attenders.
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A classification study involving several classifiers was carried out. After training and the usual validation step, the following table
shows results for classifiers tried. In below, classifiers are identified as M1, M2 and so on.
Sensitivity
Specificity
M1
0.82
0.82
M2
0.92
0.72
M3
0.72
0.92
M4
0.46
0.47
M5
0.03
0.16
M6
0.13
0.02
M7
0.33
0.64
M8
0.72
0.24
M9
0.47
0.82
M10
0.06
0.84
The following list has statements about the classifiers. In the list, there is a single incorrect statement. Please identify the incorrect
statement.
Hint 1: recall that a classifier dominates another if both performance measures are better.
Hint 2: to help you visualize and compare classifiers, you may want to plot the classifier data in a ROC graph (which will not be
submitted).
Select one:
Qa.
O b.
Oc.
d.
By swapping zeroes and ones, M5 can be worsened
M8 does not dominate M9
M1 dominates all of M4, M5 and M6
M1 is a good classifier
?
e.
By swapping zeroes and ones, the performance of M4 does not change…
Consider the following training data, shown below before centering.
XY
1
0
1
1
1
1
1
1
00
1
1
1
0 0
1
1
1
0
1
1
This data set will be analysed after centering all columns (not scaling). In what follows, the centered data columns are referred to as
X and Y. Using these centered columns, we have the following quantities: XTX = 24/11 = 2.1818; XTY = 13/11 =
and YTY = 24/11 = 2.1818.
Ridge regression
Q1 For 2 =
R
AR
=
1.1818
0.56, compute and write in the provided space the ridge estimate ẞ (0.56). Use decimal numbers, not fractions.
Q2 Using the ridge estimate ẞ (0.56) you just computed, determine the percentage of shrinkage achieved with respect to the
squared L2 norm. That is, compute the shrinkage using || (0.56)||||||with the OLS estimate. In the provided space, write
the shrinkage as percentage between 0 and 100 with decimal values.
Lasso
AR
Q3 The following are several expressions for the lasso estimate: (2) = 0.5833 * (1 - 0.84622);
L
L
(a) = 0.5833 * (1 -0.78572); (A) = 0.5417 *…
Calculate the 95% confidence intervals for the proportion of children surviving, and the proportion of non-crew adult passengers surviving. We want to use the given data to make inferences about the general population of all large boat crashes, so the data set should be treated as a random sample for this purpose.
Part 2
The 95% confidence interval for survival rate amongst non-crew adults runs from
enter your response here% to
enter your response here%.
(Round to one decimal place as needed. Use ascending order.)
Part 3
The 95% confidence interval for survival rate amongst children runs from
enter your response here% to
enter your response here%.
(Round to one decimal place as needed. Use ascending order.)
Part 4
Test the alternative hypothesis that the proportion of children surviving does not equal 35%, and next, test the alternative hypothesis that the proportion of non-crew adult passengers surviving does not equal 35%. Again, the data set should…
Chapter 10 Solutions
Stats
Ch. 10.2 - 1. Various claims are often made for surveys. Why...Ch. 10.4 - 2. We need to survey a random sample of the 300...Ch. 10 - Prob. 1ECh. 10 - 2. Satisfied workers The managers of a large...Ch. 10 - Prob. 3ECh. 10 - Prob. 4ECh. 10 - Prob. 5ECh. 10 - 6. Sampling satisfaction A company hoping to...Ch. 10 - Prob. 7ECh. 10 - 8. Satisfactory satisfaction samples For each...
Ch. 10 - Prob. 9ECh. 10 - 10. Happy employees The company plans to have the...Ch. 10 - Prob. 11ECh. 10 - 12. Surveying employees The company of Exercise 2...Ch. 10 - Prob. 13ECh. 10 - 14. Student center survey For their class project,...Ch. 10 - Prob. 15ECh. 10 - Prob. 16ECh. 10 - Prob. 17ECh. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - Prob. 19ECh. 10 - Prob. 20ECh. 10 - Prob. 21ECh. 10 - In Exercises 17 to 23, for the reports about...Ch. 10 - Prob. 23ECh. 10 - 24. Mistaken poll A local TV station conducted a...Ch. 10 - Prob. 25ECh. 10 - 26. Parent opinion, part 1 In a large city school...Ch. 10 - Prob. 27ECh. 10 - 28. Churches For your political science class,...Ch. 10 - 29. Playground Some people have been complaining...Ch. 10 - 30. Roller coasters An amusement park has opened a...Ch. 10 - 31. Playground, act two The survey described in...Ch. 10 - 32. Wording the survey Two members of the PTA...Ch. 10 - 33. Banning ephedra An online poll on a website...Ch. 10 - 34. Survey questions Examine each of the following...Ch. 10 - Prob. 35ECh. 10 - 36. Phone surveys Any time we conduct a survey, we...Ch. 10 - 37. Cell phone survey What about drawing a random...Ch. 10 - 39. Fuel economy Occasionally, when I fill my car...Ch. 10 - 40. Accounting Between quarterly audits, a company...Ch. 10 - 41. Happy workers? A manufacturing company employs...Ch. 10 - 42. Quality control Sammy’s Salsa, a small local...Ch. 10 - 43. A fish story Concerned about reports of...Ch. 10 - 44. Another fish story In recent years, beaches...Ch. 10 - 45. Sampling methods Consider each of these...Ch. 10 - 46. More sampling methods Consider each of these...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- Using the toddler data table in Question 1, describe the toddlers in the sample with joint probabilities only. (300) B(K)-00+300 501 30 smot dbabib (oor de leng 001-009:(00s) 200, yoogie Fox (D) ed to diman edarrow_forwardRight-Handed Left-Handed 24 Gender Males 4 Females 2 12arrow_forwardappropriate probabilities. 19 Using the data from Table 17-1, are gender and political party independent for this group? nis cow sib signia si Falows grillor le pussarrow_forward
- 11 Using the same toddler data, describe the toddlers with marginal probabilities only. BAY bit of benoliesmas (89 abje' jook stages of te cojota ing ou an out of to cojota ovig ber el ba 3+4=029arrow_forward21 Using the data from the table in Question 1, does the dominant hand differ for male toddlers versus female toddlers? (In other words, are these two events dependent?)arrow_forwardop In a two-way table with variables A and B, does P(A|B) + P(A|B) = 1? பே 69 6 work as m 3 atavs ow to portabagabat sot gaisarrow_forward
- In a two-way table with variables A and B, does P(A|B)+P(A|B)=1? dsins/Ispino936) 1 durab ALED a to gilidadost Earrow_forwardpreference are dependent (you even have to look at the males). Using the bumper sticker data in the first example problem in this chapter, are car age and number of bumper stickers related (In other words, are these two events dependent?) d insbusqabni oss agit ads bms gliw woy tadi validadong ada 15W wex s m ad ow MP gliw Boy 1st yilidadong at al terW .d Shsed smo viaxe 5X9 of pe 012 from 12 or to HOM qose Aunt swam to prepants M&arrow_forward23 வ dous biops Which marginal probabilities that you find in a two-way table should sum to 1? 著arrow_forward
- Using the toddler data from the table in Question 1 and appropriate probability notation, do the following: a. Compare the right-handed female and male toddlers in the sample, using condi- tional probabilities (only). b. Compare the right-handed toddlers asid in the sample, using conditional probabilities (only).dependent abni sis & bas bax bensqged snavs med) galworl andarrow_forwardUsing the toddler data from the table in Question 1 and appropriate probability notation, identify and calculate the following: a. What percentage of the male toddlers are right-handed? te b. What percentage of the female toddlers are right-handed? c. What percentage of the right-handed toddlers are male? d. What percentage of the right-handed toddlers are female?arrow_forward10 Using the toddler data from the table in Question 1 and the appropriate probability Tonotation, identify and calculate ther s following: a. What percentage of the toddlers are right-handed? b. now to What percentage of the toddlers are female? female? da boit vom wo c. What proportion of the toddlers are left-handed? d. What's the chance of finding a male toddler from the sample? [10arrow_forward
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