Activity #2 (4th Quarter)

Which of the following characteristics of the t-distribution is NOT true?

• It is a bell-shaped curve symmetrical about the mean.

• The mean of the distribution is equal to 0 and is located at the center of the distribution.

• The curve is asymptotic to the 𝑥-axis.

• The variance of the distribution is always less than 1.

True or False: (Write your answer in CAPITAL LETTERS)
The mean of the distribution is equal to 1 and is located at the center of the distribution.

Who developed the t-distribution?

• William S. Gosset

• Willy S. Gosset

• William S. Gossey

• Willy S. Gossey

Which of the following is formula of t-distribution?

Find the value of t-distribution for a 95% confidence interval when the sample size is 30.

Find the value of t-distribution for a 90% confidence interval when the sample size is 40.

Find the variance of the t-distribution with 35 degrees of freedom. (Two decimal points)

Find the variance of the t-distribution with 23 degrees of freedom. (Two decimal points)

Find the variance of the t-distribution with sample size is 38. (Two decimal points)

Find the variance of the t-distribution with sample size is 46. (Two decimal points)