Which of the following are true? select one or more:
the t-distribution is skewed to the left the t-distribution is centered at 1.0
the t-distribution is bell shaped
the t-distribution has fewer values at the extremes than a standard normal distribution
the t-distribution has more values at the extremes than a standard normal distribution
the t-distribution is centered at 0

(c) The t-distribution is bell shaped

(e) The t-distribution has more values at the extremes than a standard normal distribution

(f) The t-distribution is centered at 0

Step-by-step explanation:

When the sample size is small or population variance is unknown, and we have to estimate population parameter then t- probability distribution is used.

 The t-distribution has properties as follows:

i am not sure :

step-by-step explanation: