Question 4An incubation period is a time between when you contract a virus and when your symptoms start. Bysurveying randomly selected local hospitals, a researcher was able to obtain a sample of incubation periodsand construct an interval estimate with the lower bound 5.2 days and the upper bound 6.6 days. Based onthe interval estimate, is it reasonable to believe that the average incubation period of the novelcoronavirus is less than 8 days? Explain.?, because18 days.Select an answerSelect an answerthe entire interval is below?NoYesa part of the interval (or possibly the entire interval) is belowthe entire interval is abovea part of the interval (or possibly the entire interval) is above

The interval estimate for average incubation period is given by (5.2, 6.6).

Answered: An incubation period is a time between…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question 1 A sample of 14 cans of coffee has an average weight of 16 ounces and a variance of 4 ounces2. Assume that the weight of cans is normally distributed. Keep 4 digits after the period for all questions (e.g., 2.4505). a) Determine the margin of error for an 80% confidence level for the population averageweight. Show your work. b) Construct the 90% C.I. for the population average weight. Show your work.
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?
Why would the null hypothesis not be the mean lifespan of sexually inactive males (62.5)?
this is only 1 question with some parts. please answer the whole parts!!!
Katie thinks that people living in a rural environment have a healthier lifestyle than other people. She believes the average lifespan in the USA is 77 years and the lifespans follow an approximately normal distribution. A random sample of 13 obituaries from newspapers from rural towns in Idaho give = 78.9 and s = 2.83. Does this sample provide evidence that people living in rural Idaho communities live longer than 77 years? (a) State the null and alternative hypotheses: (Type "mu" for the symbol μ, e.g. mu >1 for the mean is greater than 1, mu < 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1) Ho: Ha (b) Find the test statistic = (c) Answer the question: Does this sample provide evidence that people living in rural Idaho communities live longer than 77 years? (Use a 10% level of significance) (Type: Yes or No)
A psychologist has developed a new test to measure depression. Using a very large group of "normal" individuals, the mean score on this test is found to be p=55 and a population standard of o=12. The scores form a normal distribution. A researcher would like to use this test to evaluate a theory predicting that increased depression is a common part of the aging process. To test the theory, a sample of n=36 elderly people is obtained. The depression test is administered to each person, and the mean score for the sample is 59. Testing the hypothesis using a one-tailed test at 0.05 level of significance, do these data support the theory? You can answer "Yes" or "No". Do the 4-step process to determine the answer. Answer:

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