Question 4: A group of researchers intends to study the average time that a certain drug takes to take effect. Based on

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Question 4 A Group Of Researchers Intends To Study The Average Time That A Certain Drug Takes To Take Effect Based On 1 (51.68 KiB) Viewed 61 times

Question 4: A group of researchers intends to study the average time that a certain drug takes to take effect. Based on a sample of 20 patients, an average time of 60 minutes and a variance of 100 minutes were obtained. a) What is the point estimate of the average time that the drug takes to take effect? b) Obtain a 98% confidence interval for the average time the drug takes it is made. c) Based on the confidence interval obtained in (b), what is the sampling error of the point estimate? d) These researchers decided to collect a second sample with 40 patients, resulting in a time mean of 50 minutes and standard deviation of 90 minutes. What should the sample size be so that the error made when estimating the average time that the drug takes to take effect is not more than 10 minutes, with a probability of 0.95?