Answer to Question #339345 in Statistics and Probability for Henny

Question

What is the t value with a 90% confidence interval for the true population mean if the sample size n = 27?

(Please keep three decimal places)

t value= ____________

Answer 1

The critical value for $\alpha = 0.1$ and $df = n-1 = 26$ degrees of freedom is $t_c = z_{1-\alpha/2; n-1} = 1.706.$