For each of the following combination of the confidence level and sample size determine the appropriate t-value.
n=10, 99% confidence?
n=20, 98% confidence?
n=25, 80% confidence ?
Which of the following are true?
The t-distribution is centered at 0.
The t-distribution has fewer values at the extremes than a standard normal distribution
The t-distribution is skewed to the right.
The t-distribution is symmetric.
The t-distribution has more values at the extremes than a standard normal distribution.
The t-distribution is centered at 1.0