One-sample t test
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.
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.