sample distribution

  1. B

    Central Limit Theorem Indicative of Underlying Distribution?

    Hi All, I've been reading threads off and on for a couple days, and I can't get a good feel for how to answer this question I've got stuck in my head. I'm sure the answer is in here, but I'm an engineer, not a statistician, so I can't make the leap to apply the posts I've read to the...
  2. V

    Sample Distribution Probability (unsure if correct answer)

    1. Carlinville, Illinois, has just started an ambitious recycling program. Special trucks collect recyclable products once a week, sorted into barrels of paper, glass, and plastic. The amount of glass recycled per week by a single household is normally distributed with mean 27 pounds and...
  3. A

    Sampling distribution of the sample proportion.

    A random sample of 20 students is selected. What is the probability that the sample proportion exceeds 75%, i.e., more than 15 students (out of 20 selected) will agree that that the course is interesting? You may leave your answer as, for example, 1 − 0.88. (As a standard error use 0.8. Also...
  4. T

    Could someone verify my logic for managing probability distributions in an experiment

    I'm not well versed in stats lingo, but am hoping my logic in the concepts here makes sense and is correct. Often in my work (measuring electrical responses of cells) I take of more than one independent measure per sample, such as the time to an event occurring, along with the size of that...
  5. E

    Why are these statements false?

    Hello, I was doing a practice test and I got two questions wrong. The answer key said that these two statements were false: As sample size increases, the standard deviation of the sampling distribution and the standard deviation of the population are increasingly similar. -and- For the...
  6. M

    Unbalanced dependent sample and intercept correction

    Hi, I’m running a logistic regression analysis in SPSS and wanted to ask about the sample values for the dependent variable (landslide presence). My dependent variable is binary and has observed values of 1, or presence of landslides (252,204 cases, 86% of the sample), and 0, or absence of...
  7. U

    Help on Sample Distribution - Statistic for Business! =)

    I am currently solving this problem for next week presentation. My answer is super close to the correct answer, somehow I can't find the correct answer using my method. Question: In evaluating the customer satisfaction level, a company would like to be 95% confident that the error in...
  8. H

    Sample distribution help!!!

    I'm studying for my upcoming stats test and i can't seem to figure out this problem its been bugging me for over an hour now. I thought that i would use the central limit theorem where i would subtract the sample mean from the population mean and divide it by the standard deviation which was...