Essentials of statistics

posted by .

A populations of scores forms a normal distribution with a mean of 40 and a standard deviation of 12 what is the probability of selecting a sample of n=9 scores with a mean less than m=34

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. stat

    the average number of pushups a United States Marine does daily is 300, with a standard deviation of 50. A random sample of 36 marines is selected. What is the probability that the sample mean is at most 320 push-ups?
  2. statistics

    The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 50 students who took the exam is selected for …
  3. Stastics

    When we convert x-value to z- score and use Standard Normal distribution, which of the following statements is true?
  4. Statistics

    For a normal distribution with a mean of m = 80 and a standard deviation of s = 20, find the proportion of the population corresponding to each of the following scores. a. Scores greater than 85 b. Scores less than 100 c. Scores between …
  5. college

    Essentials of statistics is the subject and the question is: The population of IQ scores forms a normal distribution with a mean of u=100 and a standard deviation of sigma=15. What is the probability of obtaining a sample mean greater …
  6. statistics

    1. A random sample of n = 16 scores is selected from a normal distribution with a mean of µ = 50 and a standard deviation of á = 10. What is the probability that the sample mean will have a value between 45 and 55?
  7. statistics

    A population of scores forms a normal distribution with a mean of µ = 40 and a standard deviation of SD = 12. a. What is the probability of randomly selecting a score less than X = 34?
  8. probability and statistics

    a population forms a normal distribution with a mean of u=80 and a standard deviation of o=15. for each of the following samples, compute the z-score for the sample mean and determine whether the sample mean is a typical, representative …
  9. Math

    I need help with this these two problem PLEASE!!! For a population with a mean of μ  80 and a standard deviation of   12, find the z-score corresponding to each of the following samples. a. M  83 for a sample of n  4 scores …
  10. Statistics

    The distribution of IQ scores is a nonstandard normal distribution with a mean of 100 and a standard deviation of 15. What are the value of the mean and standard deviation after all IQ score have been standardized by converting them …

More Similar Questions