T Distribution

1. t- distribution is a probability distribution used to estimate parameters EXCEPT when________.

• a. the population standard deviation is known

• b. the sample size is small

• c. the population variance is unknown

• d. the sample size is small and population variance is unknown

2. t- distribution is also known as _________.

• a. Teacher’s t- distribution

• b. Z- distribution

• c. Student’s t- distribution

• d. a. Teacher’s Z- distribution

3. Given a set of data, which of the following refers to the independent observations?

• a. Variance

• b. Degrees of freedom

• c. standard error

• d. standard deviation

4. Which of the following is the value of t_0.05 with a sample size of 10?

• 1.812

• 1.900

• 1.860

• 1.833

5. 1. Which of the following is the value of t_0.01 with 11 degrees of freedom?

• a. 2.764

• b. 2.681

• c. 2.821

• d. 2.718