StatisticsdrillCritical t value for an interval
A statistics problem from Statisticsdrill. Solve it with one answer box, with a fresh sample on every attempt and the worked steps and spreadsheet function in the answer, and it is checked the moment you submit.
The task
You will build a 90% confidence interval for a mean from a sample of 5 observations, with the population standard deviation unknown. What critical value t* should you use? Round to 3 decimal places.
What this problem teaches
Use the t distribution with n - 1 degrees of freedom, and split the leftover area between the two tails.
A hint if you get stuck
Use the t distribution with n - 1 degrees of freedom, and split the leftover area between the two tails.
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