Mean systolic blood pressure is 120 for a sample of 20 individuals, with a sample standard deviation of 15. The population standard deviation is unknown. Calculate a 95% confidence interval.
I do not have a clue. I have read through this section in my book several times and have viewed the youtube videos. Can you help?:shock:
I do not have a clue. I have read through this section in my book several times and have viewed the youtube videos. Can you help?:shock: