Question

Q5:T distribution is used when
​

Answer 1

The normal distribution assumes that the population standard deviation is known. ... The t-distribution is most useful for small sample sizes, when the population standard deviation is not known, or both. As the sample size increases, the t-distribution becomes more similar to a normal distribution.

brainlist plz!

Answer 2

Answer:

The t-distribution is used when data are approximately normally distributed, which means the data follow a bell shape but the population variance is unknown. The variance in a t-distribution is estimated based on the degrees of freedom of the data set (total number of observations minus 1).