Tue 13 Nov, 2018 03:06 am
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation. Assume that the population has a normal distribution.
The hockey coach selected eight players at random and timed how long each player took to finish their exercises. The times (in minutes) were:
8, 15, 12, 10, 10, 7, 9, and 9.
Find a 90 percent confidence interval for the population standard deviation.
Use this standard deviation calculator. https://www.mathcelebrity.com/chiconf.php
. You will need to compute the variance of your distribution.