Concerns about climate change.and CO2 reduction have initiated the commercial production of blends of blodiesel jeg. fromrenewable sources) and petrodiesel (from fossil fuel). Random samples of 47 blended fuels are tested in a lab to ascertain the bio/totalcarbon ratio.(a) If the true mean is .9340 with a standard deviation of 0.0020, within what interval will 95 percent of the sample means fall? (Roundyour answers to 4 decimal places.)The interval is fromto(b) If the true mean is .9340 with a standard devlation of 0.0020, what is the sampling distribution of X?1. Exactly normal with u.9340 and o-0.0020.2. Approximately normal with u.9340 and a- 0.0020,3. Exactly normal with u=9340 and o = 0.0020 /47.4. Approximately normal with u.9340 and o = 0.0020 V47.04(c) What theorem did you use to answer part (b)?

The mean is 0.9340 and the standard deviation is 0.0020.

Answered: Concerns about climate change.and CO2…

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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18.20 Immigration. Suppose that 29% of all adult Americans think that the level of immigration to the United States should be decreased. An opinion poll interviews 1520 randomly chosen Americans and records the sample proportion who feel that the level of immigration to this country should be decreased. This statistic will vary from sample to sample if the poll is repeated. The sampling distribution is approximately Normal with mean 0.29 and standard deviation about 0.012. Sketch this Normal curve and use it to answer the following questions. a. The mean of the population is 0.29. In what range will the middle 95% of all sample results fall? b. What is the probability that the poll gets a sample in which fewer than 27.8% say the level of immigration to this country should be decreased?
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Concerns about climate change and CO2 reduction have initiated the commercial production of blends of biodiesel (e.g., from renewable sources) and petrodiesel (from fossil fuel). Random samples of 33 blended fuels are tested in a lab to ascertain the bio/total carbon ratio. (a) If the true mean is .9510 with a standard deviation of 0.0030, within what interval will 99 percent of the sample means fall? (Round your answers to 4 decimal places.) The interval is from Not attemptedto Not attempted (b) If the true mean is .9510 with a standard deviation of 0.0030, what is the sampling distribution of X¯¯¯X¯ ? Exactly normal with μ = .9510 and σ = 0.0030. Approximately normal with μ = .9510 and σ = 0.0030. Exactly normal with μ = .9510 and σx¯= 0.0030/33−−√.σx¯⁢= 0.0030/33. Approximately normal with μ = .9510 and σx¯= 0.0030/33−−√.σx¯⁢= 0.0030/33. 1 2 3 4
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