A random sample of 12 subjects was asked toperform a given task. The time in seconds it took each of them tocomplete the task is recorded below: 27, 32, 47, 25, 32, 26, 35, 25, 36, 35, 39, 27
If we assume that thecompletion times arenormally distributed, find a 90% confidence interval for the true mean completion time for this task.
What are the lower limit and upper limit of the confidence interval?
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.