testing

  1. G

    Аn infinite number of experiments testing a process

    For an infinite number of experiments testing a process — a process that can be represented as an arbitrarily long finite sequence of combinations of a finite set of elements — should each such process occur?
  2. Z

    Bayesian hypothesis testing

    Suppose you are flipping a coin. You are considering the following hypothesis: The coin is weigthed so it comes up head 1/4 of the time and tail 3/4 of the time. Assume that the prior probability is 1/3. You now flip the coin ten times and get seven heads. What are the probabilities of...
  3. E

    Testing My Hypothesis About a Relationship

    When I say "testing my hypothesis," I am not talking about statistical hypothesis testing. I expect x and y to have a strong positive correlation. I expect the same change in x to affect y more for the middle values of x than for each end, like the shape of y = -x^2. What would show if the...
  4. R

    Hypothesis Testing Help

    I just need help starting this problem. I'm taking the class online and I'm having trouble. In 2015, Netflix subscribers spent an average of 1.5 hours per day streaming content. To determine if there is an increase in viewing, suppose a new survey was conducted of subscribers. Of the 354...
  5. R

    Hypothesis Testing Help

    I just need help starting this problem. I'm taking the class online and I'm having trouble. In 2015, Netflix subscribers spent an average of 1.5 hours per day streaming content. To determine if there is an increase in viewing, suppose a new survey was conducted of subscribers. Of the 354...
  6. N

    Hypothesis Testing

    Listed below are the ages of the 146 employees who perished in the Triangle Factory in 1911 in Manhattan. One factor contributing to the larger number of deaths is that almost all exits were locked so that employees could be checked for theft when they finished work at the end of the day. That...
  7. S

    Hypothesis Testing

    Someone show me the 5step solution to this problem.
  8. T

    Hypothesis testing question

    Hi, Can someone explain how to do a two tailed test? My hypotheses are H0 : theta = 1. H1: theta not equal to 1. I have been given a distribution and a test statistic which I know nothing about apart from how to compute values (using r) Thank you
  9. S

    Hypothesis Testing - NEED HELP

    Question 1 Below are the quarterly returns on investment (in £000s) of two different investment projects, which had the same initial outlay. There is a sample of 16 quarters of returns and your manager has asked you to investigate the relative performance of each project. In particular, your...
  10. M

    Interesting concept in need of testing

    I noticed something really interesting and I want to test an idea that developed from it, but for some reason the math isn't coming out right even when I know what the result should be. I find standard variable letters really confusing, so below I use these when talking about triangles...
  11. F

    Help hypothesis testing

    I have attached a jpeg of this question that I am having a hard time answering. Any help would be appreciated.
  12. K

    Hypothesis testing

    Hi all, I'm currently doing some hypothesis testing assignments (not mandatory, just for fun :) ), and there's one I'm having quite some issues with. In a Gallup-pole, 1525 people are asked about their political opinions. The pole shows that "Red-party" has 48.2% of the votes whereas a...
  13. Mr Davis 97

    Hypothesis construction for significance testing

    1. The problem statement, all variables and given/known data State the null and alternative hypotheses. The decision to implement changes in the current math program at a junior high will be based on a sample of students' scores on a standardized math exam. If the average is less than the...
  14. J

    Testing Convergence

    Which test should I use for Summation from n=1 to oo I tried ratio test and ended up with oo but am unsure of whether I did the calculation correctly.
  15. D

    Hypothesis Testing

    6. Researchers claim that the proportion of nurses who smoked a cigarette in the past week is less than 0.10, and the sample statistic include n = 190 subjects with 16 saying they smoked a cigarette in the past week. Test this claim at the 0.05 significance level. Hypotheses...
  16. F

    Statistical hypothesis testing

    Having some trouble with it, can you help me? Thank you! Publications data shows that the proportion of children on elementary school with posture problems is 0.20. In order to reduce this proportion, a campaign of "good posture practices" was conducted in schools. To verify if the campaign...
  17. F

    latex testing

    \begin{align*} 3x^2-2x+7 &=0 \end{align*} , then \begin{align*} (x-\frac{1}{3})^2 \end{align*}
  18. T

    Testing standard deviations

    Theres 2 batches of ropes, with random samples; Batch 1 sample : n= 15 and mean length 1.99922 metres and standard deviation 1.30 mm. Batch 2 sample : n=10 and mean 1.99938 metres and standard deviation 1.03 mm. 1.Test whether the standard deviation length for ropes in Batch 1 is the same as...
  19. S

    Testing making symbols

    I made this thread to test being able to write symbols on this forum. Any tips would be appreciated. \int_e^\pi y \, \mathrm{d}x \cos (2\theta) = \cos^2 \theta - \sin^2 \theta Apologies if this comes out wrong and/or weird, I've never done this before and am quite confused about it :? :?
  20. M

    Graph Isomorphism Testing

    I found reduction of general task of graph isomorphism testing to more particular task of labeled trees isomorphism, that task was solved earlier. Please, see "Polynomial Time Algorithm for Graph Isomorphism Testing" http://arxiv.org/abs/1004.1808 (current version is 6). I would be very...