There are four questions about this problem in the test shown in random order.Out of 1000 customers in the test data, there are only 100 buyers. A classification model appliedto these customers, predicts 200 buyers. If buying is regarded as positive, there are 50 truepositives.What is the number of false positives?a.200O b. 15050O d. 100

Out of 1000 customers in the test data, there are only 100 buyers. A classification model applied to…

Answered: There are four questions about this…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Suppose we want to estimate the proportion of the Helena population who have used marijuana within the last month. We select 4328 participants and ask them each to first privately draw a card from a standard 52-card deck. If they get a “club” they are asked to respond truthfully to the question “Have you used marijuana within the last month?”If they get any other suit they are asked to respond to the question “Does your phone number end in an odd digit?”The study is blinded in the sense that the researcher doesn’t know which question the participant is answering. Hence, participants are guaranteed anonymity and are more likely to be truthful in their responses. The researchers only get a “yes” or “no” answer from each respondent and don’t know the actual results of the card draw. What is the expected probability of a person’s phone number ending in an odd digit? What is the expected probability of a person’s phone number not ending in an odd digit?
4) You know that 70 percent of the subs at theme parks in the US are yellow. There are 220 subs in theme parks in the US. You are in a contest where you select sub names from a hat and record the name of the theme park sub. (No replacement ). You win a prize if you select a greater percentage of yellow subs than 90% of your many many competitors. What percentage of yellow subs do you need to select?
12. Dr. Pat Jones is an industrial psychologist and is currently studying stress amount internet company executives. A questionnaire was developed to measure stress. A score above 80 indicates stress at a dangerous level. A random sample of 15 executives revealed the stress scores in the attached file. homework 3 - 2.xlsx ( Stress 94, 78, 83, 90, 78, 99, 97, 90, 97, 90, 93, 94, 100, 75, 84 ) What is the point estimate of the population mean? (answer should be in xx.xxx format)
A multiple choice quiz consists of 10 questions, each with 4 possible answers. Find the mean for the number of correct answers, if a student guesses on each question. ОА. 40 B. None of these О С. 2.5 O D. 5
2-) and presents summaries on its website. Assume the following data are a sample of the annual salary and bonus for 10 sales vice presidents. Data are in thousands of dollars. (Please fill in the empty boxes with random numbers. The numbers you choose should not be the same as your friends'). Kikir&Mirmir Co., a pet supplies company, conducts survey of salary data Salary ($1000s) Bonus ($1000s) 135 12 115 14 16 167 165 22 176 24 7 136 17 18 119 According to this data, please derive and compose the ANOVA table (With a 95% significance level) (except Multiple R, Adjusted R, t-stat, t-stat. standard errors and confidence levels).
7. A random sample of 400 men and 400 women was randomly selected and asked whether they planned to attend a concert in the next month. The results are listed below. Perform a homogeneity of proportions test to test the claim that the proportion of men who plan to attend a concert in the next month is the same as the proportion of women who plan to attend a concert in the next month. Use a = 0.05. Меп Womeп Plan to attend concert 230 255 Don't plan to attend concert 170 145
4) A set of 15 data points has mean 28.2. When one data point is disregarded, the mean of the remaining 14 data points is 27. What is the value of the disregarded data point?
If two people are asked to list their choices of favorite movie genre from among action (a), romance (r), and comedy (c), list the sample space showing the possible outcomes. Choose the correct answer below. О А. (а, г). (а, с), (г, а), (г, с), (с, а),. (с., г) О В. (а, а), (г, г). (с, с) ОС. (а), (). (с) OD. (a, a), (а, г), (а, с), (г, а), (г, г), (г, с), (с, а), (с, г). (с, с)
I need help on these questions. The table is attached. Use Table B, starting at line 119, to choose the first 5 drivers in the sample. Drag the token representing the label of the driver selected to the appropriate column. (b) One question asked was, “Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections?” Of the 880 respondents, 171 admitted that at least one light had been red. A practical problem with this survey is that people may not give truthful answers. What is the likely direction of the bias: do you think more or fewer than 171 of the 880 respondents really ran a red light? A) Fewer than 171 of the 880 respondents really ran a red light. B) More than 171 of the 880 respondents really ran a red light. Why would there be such a bias? A) The test suffers from sample bias. B) People may be concerned that they will get in trouble if they admit to running red lights. C) Those…
suppose you select a simple random sample of 75 douglas college student and you find that 8 are left handed what is the best point of estimate of p, the proportion of all douglas college students who are left handed
3. At a factory that produces doorknobs, a batch of 1500 doorknobs has just been produced. To check the quality of the doorknobs, a random sample of 100 doorknobs is selected to test for defects. Out of these 100 doorknobs, 2 were found to be defective. Based on these results, what is the best estimate you can give for the number of defective doorknobs in the batch of 1500? Solve this problem in two different ways, explaining your reasoning in each case. just been
A researcher will conduct a study on the economic situation of young people between the ages of 18-25 in Izmir, Antalya and Trabzon. It is known that there are 500 thousand young people between the ages of 18-25 in Izmir, 400 thousand in Antalya and 300 thousand in Trabzon. If they want such a study from you,How would you determine the sample? At least how many people would your sample consist of? Describe in detail.

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