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    Probability

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    Finding Probability and Confidence Intervals

    Of the members of a Boy Scout troop, 15% have received the first aid merit badge. If 40 boy scouts are selected at random, find the probability that four or more will have the first aid merit badge? A) 86.6% B) 81.3% C) 36.6% D) 31.3% A food snack manufacturer samples 9 bags of pretzels off the assembly line and weig

    Calculating desired probability values

    Z is the standard normal random variable that is, the normal random variable with mean 0 and standard deviation 1. Use the table values in your textbook to determine the following a. The probability that z is less than -2.12. b. The probability that z is greater than 1.57. c. The probability that z is between -1.84 and

    Normally distribution

    The diameters of grapefruits in a certain orchard are normally distributed with a mean of 6.95 inches and a standard deviation of 0.75 inches. Show all work. (A) What percentage of the grapefruits in this orchard have diameters less than 6.6 inches? (B) What percentage of the grapefruits in this orchard are larger than 6.

    Probability and Distributions

    I need some guidance or a template to use to help me with this project. Calculations would be helpful if not a template. This is the assignment: "Using our data set from Unit 1, compose a 3-page e-mail to the head of the American Intellectual Union, which includes the following: 1.Begin your e-mail to AIU by first provid

    Stats Question 6

    A certain law school claims that 75% of its graduates pass the state bar exam on their first attempt . . . keep in mind that these are lawyers, so the claims may not be true. If we assume that the claim is true, then if a sample of N=60 graduates is selected, find the probability that: a. 48% or more pass on the first attempt

    Probability of Unmarried Couples

    Fifty-Four percent of a bank's credit card applications come from unmarried people. If s sample of N=150 applications is selected, find the probability that 90 or fewer are unmarried. (Remember continuity correction).

    Statistical Analysis on Weight of Filled Packages

    A pet food manufacturer uses an automatic process to fill packages, which have a nominal weight of 40 pounds. Supposed that the actual weight is a normally distributed variable, with a mean of 40.9 pounds, and a standard deviation of 0.5 pounds. a. What proportion of the individual bags contains less than 40 pounds? b. If a

    Satisfactory and Unsatisfactory Production Probability

    At a factory that produces pistons for cars, Machine 1 produced 414 satisfactory pistons and 276 unsatisfactory pistons today. Machine 2 produced 420 satisfactory pistons and 180 unsatisfactory pistons today. Suppose that one piston from Machine 1 and one piston from Machine 2 are chosen at random from today's batch. What is the

    Statistics and probabilities

    Workers are subject to work-related injuries. One disorder, caused by strains to the hands and wrists, is called carpal tunnel syndrome. It strikes as many as 23,000 workers per year. The U.S. Labor Department estimates that the average cost of this disorder to employers and insurers is approximately $30,000 per injured worker.

    Normal Approximation to Binomial Distribution: Retirement Income

    Of the total population of American households, including older Americans and perhaps some not so old, 17.3% receive retirement income. In a random sample of 120 households, what is the probability that greater than 20 households but less than 35 households receive a retirement income?

    Parallel Reliability

    A product is made up of two subsystems in parallel. Subsystem one consists of ten elements in series each with a failure rate of 1/100. The second subsystem consists of 5 elements in series each with a failure rate of 1/200. What is the overall reliability of the system?

    Distribution

    The funds dispensed at the atm machine located near the checkout line at the krogers in union, kentucky, follow a normal probability distribution with a mean of $4,200 a day and a standard deviation of $720 a day. The machine is programmed to notify the local bank if the amount dispensed is very low ( less an $2,500) or very hig

    probability

    According to accountemps inc. 48% of all executives believe that employees are most productive on Tuesdays. a random sample of 200 executives is taken for a study. a. what is the shape, mean, and standard deviation of the sampling distribution of the sample proportion for samples of 200? b. what is the probability that the

    Normal approximation for binomial distribution

    h-p is said to be the leading seller of pc's in the U.S WITH 27% share of the pc market. if a researcher selects 130 recent pc purchases, use the normal approximation to the binomial to find the probability that more than 39 bought a h-p computer

    Quantitative Analysis - Decision Theory Question

    Problem 10-14 BMW is planning to launch a new sport utility vehicle (SUV), Initially it will have limited production for this model, with a total of only 20,000 units being produced for the year. King's BMW has been offered up to four of the SUV's for sale. King's estimates that the profit it earns from purchasing these SUV's

    Statistics Probability Problem

    I am not sure how to compile the contingency table from probabilities given. Each yr ratings are compiled concerning the performance of new cars during the first 90 days of use. Suppose that the other cars have been categorized according to whether the car needs warranty - related repair (yes or no) and the country in which t

    Standard Deviation Mean Probability

    Many retail stores offer their own credit cards. At the time of the credit application the customer is given a 10 percent discount on the purchase. The time required for the credit application process follows a uniform distribution with the times ranging from 4 minutes to 10 minutes. a. What is the mean time for the applic

    3 Probability Homework Problems

    I need assistance with problems: 6.51, 6.52 and 6.53 in the attached document. Please use excel. 6.51 All the major stock market indexes posted heavy losses in 2008. The mean one year return for stocks in the S&P 500, a group of 500 very large companies, was -38.5%. The mean one-year return for the NASDAQ, a group of 3200

    Computing probability based on a binomial random variable

    Thank you for your help on the other questions. Your work was easily understood. Here are two questions that I need help on. 1) LaDonna asks a question in class 4 days out of 5 and Jason asks a question in class 1 day out of 5. What is the probability that one of them will ask a question in class on any given day? (Coul

    Probability that a lobster will choose tunnel

    A lobster is placed in a tank in which it is given the choice of four tunnels (a, b, c, or d) to travel through. At the opposite end of each tunnel is a cage housing 1 of four types of food. The experiment is conducted 7 separate times and the lobster chooses tunnel 'a' in 5 of the 7 trials. What is the probability that the

    probability of 11/11/11

    This is not an academic problem per say, but your website was recommended to me for figuring out the statistical significance of my niece turning 11 y/o on 11/11/11 (November 11, 2011) at 11:11 am. I presume that such a birthday can only occur once a century for November 11th to fall on the 11th year of a century ... but how

    Deterministic Probability calculations

    A toy company is conducting a research for two new exciting products (Zing-Go and Moto-bots). A survey was conducted using 150 children to determine how well each product was perceived by the group The data was organized in the contingency table shown below. Favorable Neutral Unfavorable Total Zing-Go 3

    Binomial Probability for Random Selection

    A multiple - choice test has 30 questions and each one has five possible answers, of which one is correct. If all answers were guesses, find the probability of getting exactly four correct answers. =

    Probabilty likelihood that troubles can be repaired

    An important part of the customer service responsibility of a cable company relates to the spread with which trouble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a residential service can be repaired on the same day. For the first five troubles reported on a given d

    Binomial Distribution and Random Selection of Error

    Your company's internal auditor believes that 10% of the company's invoices contain errors. To check invoices are randomly selected and 5 are found to have errors. What is the probability that of the 20 invoices written,five more would contain errors if the theory is valid? =