A market researcher wants to determine whether a new model of a personal computer that had been advertised on a late-night talk show had achieved more brand-name recognition among people who watched the show regularly than among people who did not. After conducting a survey, it was found that 12% of all people both watched the show regularly and could correctly identify the product. Also, 13% of all people regularly watched the show and 39% of all people could correctly identify the product Define a pair of random variables as shown below. Complete parts (a) through (c) X=1 if regularly watch the show Y=1 if product correctly identified a Find the joint probability function of X and Y X 0 (Do not round.) 0 X=0 otherwise Y=0 otherwise 1

A market researcher wants to determine whether a new model of a personal computer that had been advertised on a late-night talk show had achieved more brand-name recognition among people who watched the show regularly than among people who did not. After conducting a survey, it was found that 12% of all people both watched the show regularly and could correctly identify the product. Also, 13% of all people regularly watched the show and 39% of all people could correctly identify the product Define a pair of random variables as shown below. Complete parts (a) through (c) X=1 if regularly watch the show Y=1 if product correctly identified a Find the joint probability function of X and Y X 0 (Do not round.) 0 X=0 otherwise Y=0 otherwise 1

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...

See similar textbooks

Similar questions

More people are using social media to network, rather than phone calls or e-mails (US News & World Report, October 20, 2010). From an employment perspective, jobseekers are no longer calling up friends for help with job placement, as they can now get help online. In a recent survey of 150 jobseekers, 67 said they used LinkedIn to search for jobs. A similar survey of 140 jobseekers, conducted three years ago, had found that 58 jobseekers had used LinkedIn for their job search. (You may find it useful to reference the appropriate table: z table or t table)Let p1 represent the population proportion of recent jobseekers and p2 the population proportion of job seekers three years ago. a. Set up the hypotheses to test whether there is sufficient evidence to suggest that more people are now using LinkedIn to search for jobs as compared to three years ago. multiple choice 1 H0: p1 − p2 = 0; HA: p1 − p2 ≠ 0 H0: p1 − p2 ≤ 0; HA: p1 − p2 > 0 H0: p1 − p2 ≥ 0; HA: p1 − p2 < 0…
Two television stations have made efforts using profiles to promote the adoption of “forgotten” children – orphans who have physical or mental handicaps. Oklahoma City’s station KOCO helped to place 92 out of 119 children it profiled in comparison with NYC’s WCBS, which placed 21 out of 35 (Time, May 2, 1983). Because the techniques employed in presenting the profiles likely differ for the two television stations, we might wish to compare their rates of success in placing the children for adoption. Do the data provide sufficient evidence to indicate a difference in placement success rates between stations KOCO and WCBS? Test using =0.05. CAR NUMBER Manufacturer’s shock Competitor’s shock 1 8.8 8.4 2 10.5 10.1 3 12.5 12.0 4 9.7 9.3 5 9.6 9.0 6 13.2 13.0
A survey was conducted of two types of marketers. The first type being marketers that focus primarily on attracting business (B2B), and the second type being marketers that primarily target consumers (B2C). It was reported that 518 (88%) of B2B and 246(59%) of B2C marketers commonly use a business social media tool. The study also revealed that 301(51%) of B2B marketers and 248(59%) of B2C marketers commonly use a video social media tool. Suppose the survey was based on 590 B2B marketers and 420 B2C marketers. Complete parts (a) through (c) below. At the 0.05 level of significance, is there evidence of a difference between B2B marketers and B2C marketers in the proportion that commonly use the business social media tool? Let population 1 correspond to B2B marketers and population 2 correspond to B2C marketers. Choose the correct null and alternative hypotheses below. A.H0:π1=π2 H1: π1≠π2 BH0:π1≥π2 H1:π1<π2 C.H0:π1≤π2 H1:π1>π2…
Researchers wanted to conduct a study on the GPA of third year working engineering students in their University. They think that some students with work learned how to manage their time wisely and step up to leadership challenges, while a certain portion of them have problems balancing work and school, and thus, experience stress more than non-working students. The study wants to identify if there is significant difference on the GPA of third year working students with leadership roles and working students without. Identify the population from which the study should be sampled. a. All working students b. Third year working engineering students c. All engineering students in the University d. Third year Engineering Students with part-time job who have adequate time-management and leadership skills.
A global research study found that the majority of today's working women would prefer a better work-life balance to an increased salary. One of the most important contributors to work-life balance identified by the survey was "flexibility," with 41% of women saying that having a flexible work schedule is either very important or extremely important to their career success. Suppose you select a sample of 100 working women. d.) If a sample of 400 is taken how does this change your answer to b? The probability that in the sample between 37% and 47%say that having a flexible work schedule is either very important or extremely important to their career success is____.
Last year, an engineer assigned to manage Salalah festival in which he conducted a survey for the visitors who received a tourism promotion for Salalah. Out of all people received the tourism promotion for Salalah, 60% of the promoted people visited Salalah. Due to effective marketing advertisement during the festival and the good engineering management for the event, 3s% out of the promoted people who have not visited Salalah yet, want to visit it during the coming years. At the same time, 40% of the promoted people who have been to the city, want to visit Salalah again during the coming years.
The National Science Foundation (NSF) paid for “systemic initiatives” to help cities to reform their public education systems in ways that should help students to learn better. The initiative in Chicago focused on improving the teaching of mathematics in high schools. The average scores of students on a standard test of math skills were higher after two years of the programs in 51 out of 60 high schools in the city. Leaders of NSF said that this was evidence that the Chicago program was succeeding. Critics said that this doesn’t say anything about the effect of the systematic initiative. Who is correct
In 2016, the New York Times reported that the average American spent 50 minutes per day on Facebook, as compared to an average of 42 minutes per day reading, exercising, or actually socializing combined. You suspect that this gap has widened over the years, and collect a random sample of 100 people. For 50 of them (again, randomly chosen from your sample), you track their time spent on Facebook; you track the other 50 peoples’ total time spent reading/exercising/socializing. (a) Say the 2016 figures regarding Americans’ time allotments still hold true. If the population standard deviation for minutes using Facebook is 12.5 minutes, and the population standard deviation for minutes spent on reading, exercising, and socializing (referred to from here on as ”Other” activities) is 8 minutes, what are the expected value and the standard error of the difference between the average amount of time spent on Facebook and the average amount of time spent on Other activities computed from a sample…
In a recent survey, 32% of employed U.S. adults reported that basic mathematical skills were critical or very important to their job. The supervisor of the job placement office at a 4 year college thinks this percentage has increased due to increased use of technology in the workplace. She takes a random sample of 250 employed adults and finds that 95 of them feel that basic mathematical skills are critical or very important to their job. Is there sufficient evidence to conclude that the percentage of employed adults who feel basic mathematical skills are critical or very important to their job has increased at the a=.1 level of significance? what are the null and alternative hypotheses? determine the test statistic. Z0= ? please show work and explain how to use ti 83 calc to solve
A student researcher was surprised to learn that the 2017 NCAA Student-Athlete Substance Use Survey supported that college athletes make healthier decisions in many areas than their peers in the general student body. He collected data of his own, focusing exclusively on male student-athletes to see if such habits vary based on one’s sport. He asked 93 male student-athletes whether they had engaged in binge-drinking in the last month (> 5 drinks in a single sitting). Data are provided in the table below. Lacrosse Hockey Swimming Row Totals Yes – Binge 20 17 15 52 No – did not binge 16 15 10 41 Column totals 36 32 25 93 1. Calculate the effect size. Show the formula and your calculations in the space provided below: 2. Using the degrees of freedom provided by your SPSS output and an alpha value of .05, find the critical value in the appropriate table in the Appendix of your Jackson e-book. Do not round – present all…
A survey was conducted of two types of marketers. The first type being marketers that focus primarily on attracting business (B2B), and the second type being marketers that primarily target consumers (B2C). It was reported that 518 (88%) of B2B and 250 (61%) of B2C marketers commonly use a business social media tool. The study also revealed that 313 (53%) of B2B marketers and 243 (60%) of B2C marketers commonly use a video social media tool. Suppose the survey was based on 589 B2B marketers and 407 B2C marketers. Complete parts (a) through (c) below. Determine a conclusion. the null hypothesis. There of a difference between B2B marketers and B2C marketers in the proportion of the business social media tool. b. Find the p-value in (a) and interpret its meaning. p-value = (Type an integer or a decimal. Round to three decimal places as needed.) Interpret the p-value. If the proportion of B2B marketers that use the business social media tool the proportion of B2C marketers that use the…
A auto shop wants to examine the proportion of customers that have to return after an appointment. Last year, an examination of 264 customers found that 30.1% had to return after an appointment. You instituted some changes at the auto shop this year, and found from a sample of 326 customers that 22.4% had to return after an appointment. You want to conduct an analysis to determine if there has been an increase in the proportion of customers that need to return after an appointment since the past year, with a = 0. 10. Using this information, what is the critical value of your analysis? Round your final answer to two decimal places. 2.11 1.96 2.33 1.28 1.64