normal distribution. Tullowing years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately 1313 1187 1313 1187 1268 1316 1275 1317 1275 (a) Perform a descriptive statistic calculation to find the sample mean and standard deviation (to the nearest year). x 1272 s 52 (b) Find a 99% confidence interval for the mean of all tree ring dates from this archaeological site. (Round to nearest integer.) lower limit 1316.65 upper limit 1227.35 MY NOTES PREVIOUS ANSWERS 214 PRints! DETAILS How much do wild mountain lions weigh? Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains gave the following welghts (pounds). Assume that the population of x values has an approximately normal distribution, 100 94 70 60 64 109 devlation, (Enter your answers to one decimal place)

Hi, I need some help foor this question. Please do not copy with chatgpt. Please write clear I need some explain. The chatgpt is not correct. Thanks!  Rick and Morty accidentally created a highly contagious virus that is capable of killing the aliens on planet Zoinks in under a day. So far, only 8% of the population of Zoinks has been infected. Rick and Morty whipped up a test for the virus, but the test is not perfect: 90% of the time it correctly identifies a healthy alien as not having the virus, but 25% of the time it incorrectly identifies an infected alien as virus-free. One of the aliens on the planet is worried that they may have contracted the virus, so they takes 20 independent tests. Of these 20 tests, 6 indicate that they have the disease and the remaining 14 indicate that they do not. With this information, what is the probability that the alien actually has the virus?  Please First use Bayes' formula, then for the conditional probability, and then need to use binomial…

You have 5 keys, one of which is the correct one for the house. Find the PMF of the number of trials you will need to open the door, assuming that after you try a key that doesn't work you set it aside and you otherwise randomly select a key to try next.

please answer all parts