NURSING EXAM QUESTIONS
PHARMACEUTICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Z
|
|
|
F
|
|
|
T
|
|
|
None of the above
|
Detailed explanation-1: -What Is a T-Distribution? The t-distribution, also known as the Student’s t-distribution, is a type of probability distribution that is similar to the normal distribution with its bell shape but has heavier tails. It is used for estimating population parameters for small sample sizes or unknown variances.
Detailed explanation-2: -All of the distributions have a smooth shape. All are symmetric. All have a mean of zero. The shape of the t-distribution depends on the degrees of freedom.
Detailed explanation-3: -The notation for the Student’s t-distribution (using T as the random variable) is: T t df where df = n – 1. For example, if we have a sample of size n = 20 items, then we calculate the degrees of freedom as df = n – 1 = 20 – 1 = 19 and we write the distribution as T t 19.