Q20. A popular app, Zolo, has come on the market for streaming pet-friendly musicwhile others in the household are away from home for work or errands. Every month,the app attracts 10% of non-subscribing households; in other words, thesehouseholds decide to subscribe. Meanwhile, 80% of already subscribing householdsdecide to unsubscribe each month. Suppose 20% of households are currentsubscribers. Using the probabilities and states as described, what percentage ofhouseholds will likely be subscribers two months from now? (Enter numerical valueonly. Do not enter % sign. Round the percentage to 1 decimal place, or to the nearesttenth of a percent.)

Answered: Image /qna-images/answer/1029a8db-5133-4095-a863-8801894d8ad1.jpg

Answered: Q20. A popular app, Zolo, has come on…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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After post-graduate study, Mike found a job as HR analyst in London. Thecompany is currently recruiting Chief Marketing Officer. The HR departmentrecently sent out a knowledge test to the applicants after the initial CVscreening. At this stage of selection, the company does not invite the lowestscoring 30% (the opposite is the highest 70%.) back for the next face-to-faceinterview. According to the historical data, the test scores on this test arenormally distributed and has a mean of 70 with standard deviation of 10. a.What mark (to the nearest whole number) must a candidate achieve inorder to secure an interview? Show your workings.b. Explain the characteristics of standard normal distribution and normaldistribution, respectively.
A veterinarian wishes to compare the number of times race horses are reported to be lame during a 12-month period, compared with similar horses that are not raced. The veterinarian is particularly interested whether the exercise schedule used in racing may contribute to lameness rather than the total amount of exercise. The veterinarian chooses 9 race horses and then selects a matching horse that is instead used for jumping, matching horses based on age, breed, and exercising a similar number of hours each week. The table below contains the observed number of times a horse was reported as lame. Group 1 Race Jump 7 2 O (-1.329, 2.663) O (-3.405, 4.738) O (-2.459, 3.792) 2 O (-1.590, 2.923) 8 1 3 2 3 4 0 2 5 3 4 Horse 6 1 1 7 st 4 3 8 2 7 A 90% confidence interval for the MEAN DIFFERENCE in the number of times a horse is lame is given by: (hint: remember this is a matched pairs data set) 9 6 4
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A well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 700 people, 31% of them said they are confident of meeting their goals. The p-value is: Round to 4 decimals
According to Inc.com, 71% of job seekers used social media in their job search in 2018. Many believe this number is inflated by the proportion of 22- to 30-year-old job seekers who use social media in their job search. A survey of 22- to 30 -year-old job seekers showed that 310 of the 370 respondents use social media in their job search. In addition, 275 of the 370 respondents indicated they have electronically submitted a resume to an employer.
There are 64% of US adults who own a smartphone, up from 35% in 2011. Smartphones have become an important way for Americans to communicate, go online, access and share information. The Pew Research Center surveyed 1635 people in November, 2014 on smartphone ownership. Their goal was to learn how Americans use their smartphone devices. Identify the population and the sample.
Digital video recorders allow us to skip commercials when watching TV. Some allow advertisers to see which ads are watched. A study used this technology in a sample of 2507 homes in a city. XYZ monitored viewer’s reactions to ABC product ad that featured the band Roq. The ad won critical acclaim, but XYZ found that only 73% of households saw the ad. An analysis indicates that an ad has to be viewed by 72% or more households to be cost effective. Based on this test, should the local sponsor run this ad?
Digital video recorders allow us to skip commercials when watching TV. Some allow advertisers to see which ads are watched. A study used this technology in a sample of 2501 homes in a city. XYZ monitored viewer’s reactions to ABC product ad that featured the band Roq. The ad won critical acclaim, but XYZ found that only 11% of households saw the ad. An analysis indicates that an ad has to be viewed by 10% or more households to be cost effective. Based on this test, should the local sponsor run this ad? Digital video recorders allow us to skip commercials when watching TV. Some allow advertisers to see which ads are watched. A study used this technology in a sample of 2501 homes in a city. XYZ monitored viewer’s reactions to ABC product ad that featured the band Roq. The ad won critical acclaim, but XYZ found that only 11% of…
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To receive a particular professional designation, an individual must pass a specific professional exam. A preparatory course is available, and individuals who take the preparatory course, pass the professional exam 90% of the time, while individuals who do not take the preparatory course only pass the exam 20% of the time. Suppose 55% of individuals who take the professional exam have taken the preparatory course. What percent of individuals who take this exam pass? The percent of individuals passing is percent. Do NOT use the % sign as part of your answer, and do NOT round your answer.

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