MATH 221 Week 6 Quiz 2 | Devry UniversityWeek 6: Homework Question 1 A consumer analyst reports that the mean life of a certain type of alkaline battery is no more than 36 months. Write the null and alternative hypotheses and note which is the claim. 6DA. Theory and basics of writing hypotheses (Links to an external site.) (DOCX) · Ho: μ = 36, Ha: μ > 36 (claim) · Ho: μ = 36 (claim), Ha: μ > 36 · Ho: μ > 36, H...

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MATH 221 Week 6 Quiz 1 | Devry UniversityWeek 6: Quiz Question 1 (CO 5) A company claims that its heaters last at most 5 years. Write the null and alternative hypotheses and note which is the claim. · Ho: μ = 5 (claim), Ha: μ ≥ 5 · Ho: μ = 5 (claim), Ha: μ > 5 · Ho: μ = 5, Ha: μ > 5 (claim) · Ho: μ > 5 (claim), Ha: μ ≤ 5 Question 2 (CO 5) An executive claims that her employees spend no more than 2.5...

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MATH 221 Week 6 Discussion |Devry UniversityA random sample of 100 medical school applicants at a university has a mean total score of 502 on the MCAT. According to a report, the mean total score for the school’s applicants is more than 499. Assume the population standard deviation is 10.6. Answer the following questions:What would the null and alternate hypotheses be? Which one would be the claim?What kind of test is this, left tailed, right...

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MATH 221 Week 5 Quiz 2 | Devry UniversityQuestion 1(CO 4) From a random sample of 55 businesses, it is found that the mean time that employees spend on personal issues each week is 5.8 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? · (5.71, 5.89) · (5.73, 5.87) · (5.74, 5.90) · (5.72, 5.88)Question 2(CO 4) If a confidence interval is given from 8.52 to...

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MATH 221 Week 5 Quiz 1 | Devry University Question 1 From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a population standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? 5VA. Confidence intervals with population standard deviation (Links to an external site.) (1:42) 5DA. Concept an...

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MATH 221 Week 5 Discussion |Devry University1. Look in the newspapers, magazines, or other news sources for results of a survey or poll that show the confidence interval, usually as a +/- amount. Describe the survey or poll and then describe the interval shown. How does knowing the interval, rather than just the main result impact your view of the results?2. Calculate the 90% and 95% confidence intervals of the following data set assuming t...

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MATH 221 Week 4 Quiz 2 | Devry University Question 1 (CO 3) The speed of cars on a stretch of road is normally distributed with an average 48 miles per hour with a standard deviation of 5.9 miles per hour. What is the probability that a randomly selected car is violating the speed limit of 50 miles per hour? · 0.21 · 0.48 · 0.63 · 0.37 Question 2 (CO 3) A survey indicates that shoppers spend an average of 2...

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MATH 221 Week 4 Quiz 1 | Devry UniversityWeek 4: Homework Question 1 The length of time a person takes to decide which shoes to purchase is normally distributed with a mean of 8.54 minutes and a standard deviation of 1.91. Find the probability that a randomly selected individual will take less than 5 minutes to select a shoe purchase. Is this outcome unusual? Homework Help: 4VA. Calculating normal probabilities (Links to an exter...

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MATH 221 Week 4 Discussion |Devry University1.Using these 20 data points from a normal distribution, find their μ and σ. Then find P(x<20). Compare that probability with the percent of the 20 data points that are below 20.22.1 30.9 18.6 34.7 15.3 37.1 40.8 33.9 40.8 18.1 15.1 32.6 30.3 28.3 28.3 23.1 28.4 20.7 25.1 22.12.Using these 20 data points from a normal distribution, find their μ and σ. Then find P(20<x<35). Compare th...

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MATH 221 Week 3 Quiz 2 | Devry University Question 1 (CO 3) Consider the following table: Age Group Frequency 18-29 983 30-39 784 40-49 686 50-59 632 60-69 541 70 and over 527 If you created the probability distribution for these data, what would be the probability of 40-49? · 0.189 · 0.425 · 0.165 · 0.237 Question 2 (CO 3) Consider the following table of hours worked by part-time empl...

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MATH 221 Week 3 Quiz | Devry UniversityWeek 3: Homework Question 1 Let x represent the number of pets in pet stores. This would be considered what type of variable: 3DA. Discrete versus continuous variables (Links to an external site.) (DOCX) · Continuous · Discrete · Lagging · Nonsensical Question 2 Let x represent sheets of paper in a package. This would be considered what type of variable: 3DA. D...

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MATH 221 Week 3 Discussion |Devry University1. Show the calculation to find the μ and σ of a binomial variable whose probability of success if 0.3 with a total number of attempts of 20.2. Show the calculation to find the μ and σ of a binomial variable whose probability of success if 0.7 with a total number of attempts of 40.3. Show the calculation to find the μ and σ of a binomial variable with a total number of attempts of 30 with first wit...

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MATH 221 Week 2 Quiz 2 | Devry UniversityWeek 2: Quiz Question 1 (CO 2) A random number generator is used to select a number from 1 to 100. What is the probability of selecting an odd number? · 0.077 · 0.050 · 0.500 · 0.250 Question 2 (CO 2) What is the sample space to responses to a question whose answers are Up, Down, Left, or Right along with a question on preference between Blue and Red? · (Up, Dow...

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MATH 221 Week 2 Quiz 1| Devry UniversityWeek 2: HomeworkQuestion 1Given the following information, find the probability that a randomly selected student will be short or very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21Homework Help:2DB. Probabilities from a given distribution of frequencies (Links to an external site.) (DOCX) · 49.5% · 21.0% · 28.8% · 50.5%Question 2Given the following information,...

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MATH 221 Week 2 Discussion |Devry University1.Create a contingency table with two variables. Then pose two conditional probability questions for others to solve. Here is an example (do not use this one). Other students can reply with details on how to find the conditional probabilities. Red Green Blue TOTAL Large 10 2 18 30 ...

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MATH 221 Week 1 Quiz 2 | Devry UniversityWeek 1: QuizQuestion 1(CO 1) A survey of 1272 pre-owned vehicle shoppers found that 8% bought the extended warranties. What is the population and what is the sample? · Population: 1272 pre-owned vehicle shoppers; Sample: pre-owned vehicle shoppers · Population: pre-owned vehicle shoppers; Sample: 1272 pre-owned vehicle shoppers · Population: 1272 pre-owned vehicle shoppers; Sample: the 8% that boug...

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MATH 221 Week 1 Quiz 1| Devry UniversityWeek 1: Homework Results for Venus Forehand Question 1 The age of every fourth person entering a department store. The selected individuals would be considered a: 1DA. Population/parameter/sample/statistic/inferential/descriptive (Links to an external site.) (DOCX) · Population · Sample · Statistic · Parameter Question 2 Based on past experience, it is predicted ...

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MATH 221 Week 1 Discussion |Devry University1. Describe the difference between bar charts, histograms, Pareto charts, including how they are structured and in what situations are each most effectively used?2. Given the following data points, describe the steps to create a histogram with 4 classes. 5 6 3 3 4 2 7 8 9 2 5 4 3 11 21 31 22 27 28 183. Given the following data points, describe the steps to create a histogram with 3 classes. 5 ...

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COMP 100 Week 8 Discussion | Devry UniversityWeek 7: Discussion—Excel Chapter 4Why is the sorting and filtering so important when using Excel? Why do employers want potential employees to know how to create Pivot tables and charts?Review and respond to posts from others in the class.Remember This! For full credit, please post to discussions at least three times on separate days o...

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COMP 100 Week 7 Discussion | Devry University Week 7: Discussion—Excel Chapter 4 Why is the sorting and filtering so important when using Excel? Why do employers want potential employees to know how to create Pivot tables and charts? Review and respond to posts from others in the class. Remember This! For full credit, please post to discussions at leas...

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