Purchase Solution

Hypergeometric Question on Training Enrollment

Not what you're looking for?

Ask Custom Question

I can do the Hyper formula f(x) = r N-r
x n-x divided by N
n
but I cant figure out all my needed numbers from the problem.
Problem states 20% enrolled in training dropped out without completing their training and the likelihood of dropping out is the same for all participants.
If new group had 20 whats the expected value and standard deviation for number of drop outs? Usually E(x) = np, but I'm not sure if 0 is my p and 20 is my n.
Whats the probability that no one will drop out?
According to the book, x= probability of x successes in n trials, n= number of trials, N = number of elements in the population, r= number of elements in the population labeled success.
I think x = 0, n = 20, but I don't know the N for my population size or the number for the r.
Can you help?

Purchase this Solution
Solution Summary

The solution determines the expected value and standard deviation for number of drop outs.

Solution Preview

This is NOT about a hypergeometric distribution, BUT a binomial distribution. Let X be the number of drop outs. Then we know that X follows a ...

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • Distribution

    The solution answers the question(s) below.

  • CVP fixed variable costs and shifts in income

    386071 Cooper Training Services (CTS) CVP fixed variable costs and shifts in income Cooper Training Services (CTS) provides instruction on the use of computer software for the employees of its corporate clients.

  • binomial approximation and hypergeometric distribution

    201043 binomial approximation and hypergeometric distribution Suppose X has a hypergeometric distribution with N = 40, M = 10 and n = 4. a. Find P(X<=2) b.

  • Cooper Training Service: Cost of Instruction and Profits

    388924 Cooper Training Service: Cost of Instruction and Profits Cooper Training Service (CTS) provides instruction on the use of computer software for the employees of its corporate clients. It offers a course on the clients' equipment.

  • Binomial, hypergeometric, and Poisson distributions

    270514 Binomial, Hypergeometric, and Poisson Distributions Give an example for each of the following distributions, binomial, hypergeometric, and Poisson. Explain the differences and different characteristics.

  • Demographic Changes and Schools

    - Sensitivity training for students and staff for dealing with issues regarding poverty. This briefly answers a question regarding demographic changes and the effects on schools.

  • Binomial and Hypergeometric Random Variables

    504817 Binomial and Hypergeometric Random Variables 4.188: Given that x is a hypergeometric random variable, compute p(x) for each of the following case: a) N = 8, n = 5, r = 3, x = 2 b) N = 6, n = 2, r = 2, x = 2 c) N = 5, n = 4, r = 4, x = 3 See

  • Applications of the Binomial and the Poisson probability

    When is the Hypergeometric distribution used? Please see the attached file. What are some typical applications of the Binomial and the Poisson probability distribution? Explain with examples. When is the Hypergeometric distribution used?

  • Human Capital

    (Question 5.5-ish) Theodore is considering a 1-year training pro- gram, which charges $40,000 in tuition, to learn how to install airport-screening equipment.

View More Related Solutions