The true mean is .
Calculating the confidence interval
Sample mean, x = ?
Sample standard deviation, s = ?
Sample size, n = 10
Degrees of freedom (df) = n - 1 = 9
t α(2), df = ?
x – t α(2), df
x + t α(2), df
(Click on variables to replace them with their current values.)
This confidence interval does? include the true mean.
Mean = 34
Standard deviation = 34
Lower bound of confidence interval = 34
Upper bound of confidence interval = 34
This interval 34 include the true mean.