A tire manufacturing company encourages its employees to promote a zero-accident environment by practicing safety measures. However, for the past year, there are 300 recorded accidents. The data below categorized these accidents according to the shift (morning, mid, and night) when it happened and the reason of the accident (dangerous conditions and employee error). For instance, 5% of the accidents occurred during morning shift for the reason of dangerous conditions. As an HR manager, you are tasked to select one incident at random as part of your presentation to newly-hired employees. What is the probability of choosing an accident due to employee error given the fact that it happened during the night shift

A tire manufacturing company encourages its employees to promote a zero-accident environment by practicing safety measures. However, for the past year, there are 300 recorded accidents. The data below categorized these accidents according to the shift (morning, mid, and night) when it happened and the reason of the accident (dangerous conditions and employee error). For instance, 5% of the accidents occurred during morning shift for the reason of dangerous conditions. As an HR manager, you are tasked to select one incident at random as part of your presentation to newly-hired employees. What is the probability of choosing an accident due to employee error given the fact that it happened during the night shift

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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x Resorts & Spas, a magazine devoted to upscale vacations and accommodations, published its Reader's Choice List of the top 20 independent beachfront boutique hotels in the world. The data shown are the scores received by these hotels based on the results from Resorts & Spas' annual Readers' Choice Survey. Each score represents the percentage of respondents who rated a hotel as excellent or very good on one of three criteria (comfort, amenities, and in-house dining). An overall score was also reported and used to rank the hotels. The highest ranked hotel, the Muri Beach Odyssey, has an overall score of 94.3, the highest component of which is 97.7 for in-house dining. If required, round your answer to three decimal places. Click on the datafile logo to reference the data. Hotel Overall Comfort Amenities In-House Dining Muri Beach Odyssey 94.3 94.5 90.8 97.7 Pattaya Resort 92.9 96.6 84.1 96.6 Sojourner's Respite 92.8 99.9 100.0 88.4…
A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant. Historical records show that 6% of the employees suffered lost-time accidents last year. Management believes that a special safety program will reduce such accidents to 4% during the current year. In addition, it estimates that 15% of employees who had lost-time accidents last year will experience a lost-time accident during the current year. a. What percentage of the employees will experience lost-time accidents in both years (to 2 decimals)? % b. What percentage of the employees will suffer at least one lost-time accident over the two-year period (to 2 decimals)? %
Many freeways have service (or logo) signs that give information on attractions, camping, lodging, food, and gas services prior to off-ramps. These signs typically do not provide information on distances. An article reported that in one investigation, six sites along interstate highways where service signs are posted were selected. For each site, crash data was obtained for a three-year period before distance information was added to the service signs and for a one-year period afterward. The number of crashes per year before and after the sign changes were as follows. Before: 14 29 62 123 64 62 After: 15 27 41 84 76 71 (a) The article included the statement "A paired t test was performed to determine whether there was any change in the mean number of crashes before and after the addition of distance information on the signs." Carry out such a test. [Note: The relevant normal probability plot shows a substantial linear pattern.] State and test the appropriate hypotheses. (Use a = 0.05.)…
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On fan sites, there were discussions about whether the data show a home-field advantage: does the host team tend to perform better than the visiting teams? In order to answer this question, you dedicate some time to watching all 8 of the Marbula one races. For each race, you record TRUE if the host team finishes in the top 2, and FALSE otherwise. Remember, there are 16 teams competing in each race. In 2 of the 8 races, the host team finished in the top 2. You conduct a simulation of this experiment: 1000 sets of 8 races using the null proportion = a. (You need to determine the correct value of a). Of the 1000 simulated experiments shown below, you find that in b simulations, there are at least 2 races where the host team finished in the top 2. (You determine the value of b) Simulation results Sim mean: 0.98 n= 402 400- Sim sd: 0.93 n = 350 300 - 200- n= 177 100- n= 59 n- 12 # Races where host team finished in the top 2 Which of the following statements are correct? # Simulations
To inspect manufacturing processes, companies typically examine samples of parts for deficiencies. One company that manufactures ballpoint pens selected samples of ,000 pens on each of 17 days. The company recorded, for each sample of 1,000, the number of defective pens in the sample. Here are their data. 1, 1, 2, 2, 2, 3, 3, 5, 5, 6, 7, 7, 10, 11, 13, 14, 18 Send data to calculator Send data to Excel Frequency 8. 6+ 2+ 2 4 12 16 20 Number of defective pens (out of 1000) O Mean (a) For these data, which measures of OMedian central tendency take more than one value? Mode Choose all that apply. None of these measures OMean (b) Suppose that the measurement 18 (the largest measurement in the data set) were OMedian replaced by 39. Which measures of central tendency would be affected by the change? OMode Explanation Check O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Accessibility 99+ O Type here to search 2. 4.
During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. Frequency 12+ 10- 8 6 4 2 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 #items over 10 Q What is the most frequent number of over-the-limit items for this data set? ans = What is the frequency of the most frequent number of over-the-limit items? ans =
During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. Frequency 12+ 298 ans = 10- a 2 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 # items over 10 What is the frequency of times the limit was exceeded by at least 3 items?
PART C. Records in the country show that six out of 10 convicted offenders were reconvicted 10 years after being released. Officer Chimmy, the head of a rehabilitation program at a local prison, wishes to determine if its program has been successful compared to the records in the country. He then observed a random sample of 68 convicted offenders who participated in the local ultimatearm from prison's rehabilitation program and were later released. The proportion out of these numbers who Icon made by www.flaticon.com were reconvicted 10 years after being released was recorded. Formulate the appropriate null and alternative hypotheses in symbols and words. Но: ;The of the convicted offenders who participated in the local prison's rehabilitation program who were reconvicted 10 years after being released is На: ;The of the convicted offenders who participated in the local prison's rehabilitation program who were reconvicted 10 years after being released is
A particular magazine identified the top accounting firms in 8 geographic regions across a certain country. Even though all 8 regions reported growth in the past year, region A and region B reported the highest combined growths, with 17% and 25%, respectively. A characteristic description of the accounting firms in these regions included the number of partners in the firm. The accompanying table contains data on the number of partners. Complete parts (a) through (d) below. E Click on the icon to view the data table. IMPORTANT NOTE: In all of these questions, there are 2 possible ratios A/B and B/AI Our convention is to always assume that the larger variance is in the numerator (i.e., on top). The correct answer will always be found in this fashion. Similarly, in questions about a critical value, we shall consider the right (upper) tail. a. At the 0.01 level of significance, is there evidence of a difference in the variability in numbers of partners for region A accounting firms and…
A researcher is curious to see if the amount of time spent on social media influences how often friends meet in person to socialize. After their sample is selected the researcher asks the subjects on average how much time they spend on social media each day and then asks their subjects to keep track of how many times they meet in person with their friends to socialize and report back at the end of the month. What type of study design is this? The research obtains 100 participates who met with their friends in person at least 15 times in the last month to socialize and 100 participates who met with their friends in persons less than 15 times in the last month to socialize. Then the researcher asks the participants on average how many hours per day did they spend on social media during the month before. What type of study design is this? Options for both questions: Cohort, case-control, cross-sectional, clinical trial
The success of an airline depends heavily on its ability to provide a pleasant customer experience. One dimension of customer service on which airines compete is on-time arrival. The file LateFlights contains a sample of data from delayed fights showing the number of minutes each delayed fight was late for two different airlines, Deita and Southwest. Click on the datafile logo to reference the data. DATA file Delta Southwest Delta Southwest Delta Southwest Delta Southwest Delta 36 30 34 38 119 120 63 37 35 67 114 53 102 55 8 87 68 100 43 50 86 74 17 66 87 35 40 34 64 41 53 30 86 33 57 61 7. 46 52 26 70 62 75 54 80 a. Formulate the hypotheses that can be used to test for a difference between the population mean minutes late for delayed flights by these two airlines. H1= population mean minutes late for delayed Deita flights Ha= population mean minutes late for delayed Southwest flights Ho: H- 2 Select your answer H.: -a -Select your answer b. What is the sample mean number of minutes…