An incubation period is a time between when you contract a virus and when your symptoms start. By surveying randomly selected local hospitals, a researcher was able to obtain a sample of incubation periods and construct an interval estimate with the lower bound 5.2 days and the upper bound 6.6 days. Based on the interval estimate, is it reasonable to believe that the average incubation period of the novel coronavirus is less than 8 days? Explain. ?, because 8 days. No Yes Select an answer Select an answer the entire interval is below a part of the interval (or possibly the entire interval) is below the entire interval is above a part of the interval (or possibly the entire interval) is above

The researcher took a random sample of 50 residents and found that the mean height of men is 175cm. Suppose that the team is made aware of the fact that the distribution of heights is distributed normally.  1, The sample median is an unbiased estimate of the mean height of men. Is the following statement about the estimator true?    2, Determine whether or not the median or mean is an efficient estimator of the population median.

You are the manager of a restaurant that delivers pizza to college dormitory rooms. You have just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 25 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 22.4 minutes and a sample standard deviation of 6 minutes.  Perform a hypothesis test to determine if there’s evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes by answering the following questions: (a) What are the null and alternate hypotheses for this test? (b)  What is the value of the test statistic for this test? (c) Using the critical value approach, at the 0.05 level of significance, what is the decision rule? (d) What is your conclusion in context of the problem?  (Answer this question in a complete sentence(s) and include why, referring to the decision rule.) (e) Using the p-value approach, at the…

All other conditions being equal, does a larger sample size increase or decrease the corresponding magnitude of the z or t value of the sample test statistic?