quizzes/2866979/take(9) The combination of a bike lock consists of 5 digits, where the the first two digitscannot be the same, there's no restriction on the other digits. How many possibilitesare there? Remember that there are 10 digits.(10) A (very bad) factory produces plastic bags such that 30% of the plastic bags produccdarc defective and 70% are good. A sample of 5 plastic bags is selected at random.(a) What is the probability that all 5 bags selected are defective?(b) What is the probability that at least 4 of the 5 bags selected are defective?

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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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the Covid-19 pandemic, made malls in Japan begin to limit the number of visitors and time of visit. One of the marketing directors of a large department store wanted estimates the average number of customers who enter the store every five minutes. He randomly choosing a sample and paying attention to the customer for five minutes. He get the numbers 25, 32, 41, 47, 56, 80, 45, 29, 32, and 78. Then the director asked the analyst to count the number of arrivals at the store. assumes the number of arrivals is normally distributed. By using this data and the 95% confidence interval, calculate the estimated average value over the period five minutes inside the department store! What is the benefit of estimating estimated value in this case (analyze the answers you got)?
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Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they made in a given time period and found that 12% of all lenses had defects of some type. Looking at the type of defects, they found in a three-month time period that out of 34,544 defective lenses, 5865 were due to scratches. Are there more defects from scratches than from all other causes? State the Type I and Type II errors in this case. State the Type I error. Concluding that the proportion of defects from scratches is higher than 12%, when the proportion is actually 12%. O Concluding that the proportion of defects from scratches is 12%, when in reality it is less than 12%. Concluding that the proportion of defects from scratches is 12%, when in reality it is higher than 12%. O Concluding that the proportion of defects from scratches is less than 12%, when the proportion is actually 12%. State the Type II error. Concluding that the proportion of defects from scratches is…
A research done by a graduating student reports that the average score of University students in statistics course is less than 80. To test this claim, a random sample of 10 students was taken and their scores in the course are recorded as: 65,70, 80, 85, 60, 90, 80, 75, 85, 90. What type of test is it? Select the correct response: two-tailed cannot be determined O right-tailed O left-tailed
Select True or False for each statement.
A sports company is struggling during corona epidemic. This sports company uses this time in analysis to make profit when time is right. The company was doing analysis of the last digit of their jerseys, which were most sold during the FIFA world cup. The company hires you to test the claim that the last digit of jerseys from the population which has different frequency, SRS of 300 sports fans are randomly selected. The table is formed from the results. Last digit o 1 2 3 |5 |6 |7 36 37 4 8 9 Frequency 30 35 24 25 35 27 27 24 The company assigns you the tasks: 1) What are the observed and expected frequencies for their last digit of 7? Choose one of the following: a) 7.7 b) 27.27 c) 27.30 d) 30.27 e) 7.27
A company's trainees are randomly assigned groups which are taught a certain industrial inspection procedure by three different methods: At the end of the instructing period they are tested for inspection performance quality. The following are their scores. Method A: 80, 83, 79, 85, 90, 68 Method B: 82, 84, 60, 72, 86, 67,91 Method C: 93, 65, 77, 78, 88. Use the H test to determine at the 0.05 level of significance whether the three methods are equally effective.
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4* A bag containing 300 ordinary pennies is dropped on a table. What is the approximate prob- ability that between 200 and 230 coins fall heads up?
You have a sample of 500 individuals arranged in a 2 x 2 table. Of these, 220 have hypertension and 250 have Covid. there is overlap between covid and hypertension, but this is not given. which is best match for your expected values? 120,130,120.130 115, 135,110,140 110, 140, 110, 140 110,140,120,130

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