Which of the following is an example of unsupervised learning? Loan Default Prediction Predicting House Prices Classifying the image as a cat or dog Finding communities or groups in large social networks
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Which of the following is an example of unsupervised learning? Loan Default Prediction
Predicting House Prices
Classifying the image as a cat or dog
Finding communities or groups in large social networks
The objective is to identify which of the given options is an example of Unsupervised learning.
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- Which of the following are advantages of decision trees? Group of answer choices Can be applied to any data structure Robust to outliers and misclassified data Does automatic stepwise variable selection and interaction exploration Has the same assumptions required for good performance of multiple linear regression and discriminant analysis Final classification often has simple, intuitive form Makes powerful use of conditional information in handling non-homogeneity in the dataPractice not gradedSmoking 2009, women and men In Exercise 2, we ex-amined the percentage of men aged 18–24 who smoked from 1965 to 2009 according to the Centers for DiseaseControl and Prevention. How about women? Here’s ascatterplot showing the corresponding percentages forboth men and women:a) In what ways are the trends in smoking behaviorsimilar for men and women?b) How do the smoking rates for women differ fromthose for men?c) Viewed alone, the trend for men may have seemed toviolate the Linearity Condition. How about the trendfor women? Does the consistency of the two patternsencourage you to think that a linear model for thetrend in men might be appropriate? (Note: there is nocorrect answer to this question; it is raised for you tothink about.)
- Macmillan Learning Attempt 2 Several studies have shown evidence of a relationship between geographic location and the prevalence of washing with soap. A 2017 Raihan et al. study investigated the differences between soap usage in rural and urban areas of Bangladesh. The data provided in the file represent survey responses from 10,478 Bangladesh residents, labeled as rural or urban, when asked whether they wash their hands with soap before preparing food. CrunchIt! CSV Excel (xls) Excel (xlsx) JMP Mac-Text Minitab14-18 Minitab18+ PC-Text R SPSS Suppose the researchers wish to determine if the proportion of Bangladesh residents who wash their hands with soap before preparing food is significantly larger in urban areas compared to rural areas. Use software to conduct a z-test for the difference of two proportions to answer the researchers' question. Do not use a continuity correction for this test. Give the values of the z-statistic, z, and P-value, P, for this test. Please give z precise…Bullying,” according to noted expert Dan Olweus, “poisons the educational environment and affects the learning of every child.” Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure anxiety in a group of bullies and a group of victims using an 18-item, 5-point anxiety scale. Assume scores on the anxiety scale are normally distributed and that the variances of the anxiety scores are the same among bullies and victims. The group of 23 bullies scored an average of 40.1 with a sample standard deviation of 10 on the anxiety scale. The group of 28 victims scored an average of 46.8 with a sample standard deviation of 11 on the same scale. You do not have any presupposed assumptions about whether bullies or victims will be more anxious, so you formulate…Contingency table analysis (test of independence)Each home sold by Lakeland Homes can be classified according to the price level andto the style. The management would like to determine if the price of the home and thestyle of the home are independent variables. With the observed data given in thefollowing table and with a significance level of of = 0.05, conduct a formalhypothesis test to help the management in decision making process.Price Level Colonial Log Split A Frame <= $100,000 18 6 19 12 > $100,000 12 14 16 3
- Sh/question/an-airline-offers-discounted-advance/ ADER SUBJECTS v Upper level math > Statistics question & answer logicfail2 Asked 2 yrs ago. An airline offers discounted "advance purchase " fares to customers who buy tickets more than 30 days before travel and charges "regular" fares for tickets purchased during those last 30 days. The company has noticed that 60% of its customers take advantage of the advance-purchase fares. The "no-show" rate among people who paid regular fares is 30%, but only 5% of customers with advance-purchase tickets are no-shows. a) What percent of all ticket holders are no-shows? b) What 's the probability that a customer who didn't show had an advance -purchase ticket? c) Is being a no-show independent of the type of ticket a passenger holds? Explain. 5.0 * 09 Sarah Schrijvers a) The percent of no-shows is the percent of no-shows of advance-purchase tickets increased by the percent of no-shows of advance purchase tickets: P(no-show) = 0.6 × 0.05+0.4 × 0.3…q4Hint(s) Check My Work A Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people (Pew Research website, http://www.pewinternet.org/2017/10/04/americans-attitudes-toward-a-future-in-which-robots-and-computers-can-do-many-human- jobs/). Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Tax Fast-Food Nurse Auditor Worker 4 6. 6. 7 8 6 6 3 4 3 8 4 4 6 6 6. 6 a. Use a = 0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. F = 2.09 (to 2 decimals) The p-value is greater than 0.10 What is your conclusion? We cannot reject the null hypothesis that the mean scores are the same for the three professions. b. Use Fisher's LSD procedure to compare the belief that a person's job will be…
