One-sample t test

Key Questions

  • What are the conditions for conducting a one-sample t test for the mean?

    Conditions for conducting one-sample t-test for mean:
    1.) Parent population from which the sample is drawn should be normal.
    2.) The sample observations are independent. i.e the given sample is random.
    3.) The ''population'' standard deviation is unknown.

    Zankhana Desai · 1 · Feb 11 2015
  • What is the t-distribution?

    t-distribution is also known as student's t-distribution .....

    this is a probability distribution that is used to estimate the population parameter when the given sample space is small or when the variance is unknown .

    this type of distribution has three types of properties and they are:

    • mean distribution is equal to zero

    • variance is equal to v/ (v-2) where the v is the degrees of freedom and v is always less than 2

    - the variance is always greater than one. with infinite degrees of freedom the t-distribution is same as standard normal distribution.

    Janya Akiko · 1 · Mar 25 2015

Questions

Inference with the z and t Distributions