use the confidence interval to give a conclusion of the test (if possible) and also state the significance level you are using.

A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 27 patients were recorded before administering the drug and after. The 99% confidence interval for the true mean difference in total cholesterol levels (after - before) was (-78.82, -31.18). Which of the following is the appropriate conclusion?   Question 4 options:   1)  We are 99% confident that the average difference in cholesterol levels is positive, with the higher cholesterol levels being before the drug regimen.   2)  We are 99% confident that the average difference in cholesterol levels is positive, with the higher cholesterol levels being after the drug regimen.   3)  We are 99% confident that the average difference in cholesterol levels is negative, with the higher cholesterol levels being before the drug regimen.   4)  We are 99% confident that the average difference in…

If n=15, ¯xx¯(x-bar)=39, and s=11, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place.

If n=29, x¯(x-bar)=31, and s=8, construct a confidence interval at a 90% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place.