Sewage and Industrial pollutants dumped into a body of water can reducethe dissolved oxygen concentration and adversely affect aquatic species. Inone study, weekly readings are taken from the same location in a river overa 2-month period. Can the week 3 value be rejected at 95% confidencelevel? Gtab = 2.032O2Week(ppm)4.95.13.5.644.34.76.4.974.58.5.1Yes, G = 1.774O No, G = 1.774O Yes, G = 1.897O No, G = 1.8972.

Answered: Image /qna-images/answer/3a8fabdf-7e5f-4cec-9408-4fe09c1b9630.jpg

Answered: Sewage and Industrial pollutants dumped…

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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Do crows remember the faces of people who bother them? A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows scolded a person in the neutral mask in 109 out of 922 encounters. Load the data above into StatKey, and use the percentile method to find a 90% confidence interval for the difference in the proportion of crow scoldings between volunteers wearing the caveman mask and those wearing the neutral mask. What is the left endpoint and right endpoint?
1. A recent Gallop poll showed that 672 of 1019 adults nationwide think that marijuana should be legalized. a) Find the margin of error that corresponds to a 95% confidence interval. b) Find the 95% confidence interval estimate of the proportion of adults nationwide who think marijuana should be legalized
Adults are spending more and more time on the Internet, and the number experiencing computer-based or Internet-based crime is rising. A 2018 Gallup Poll of 1019 adults, aged 18 and older, found that 723 of those in the sample said that they worry about having their personal, credit card, or financial information stolen by computer hackers. Although the samples in national polls are not SRSs, they are similar enough that our method gives approximately correct confidence intervals. Explain in words what the parameter p is in this setting ? Use the poll results to give a 95% confidence interval for p.
A 90 percent confidence interval is to be created to estimate the proportion of television viewers in a certain areawho favor moving the broadcast of the late weeknight news to an hour earlier than it is currently. Initially, theconfidence interval will be created using a simple random sample of 9,000 viewers in the area. Assuming that thesample proportion does not change, what would be the relationship between the width of the original confidenceinterval and the width of a second 90 percent confidence interval that is created based on a sample of only 1,000viewers in the area?(A) The second confidence interval would be 9 times as wide as the original confidence interval.(B) The second confidence interval would be 3 times as wide as the original confidence interval.(C) The width of the second confidence interval would be equal to the width of the original confidence interval.(D) The second confidence interval would be 1/3 as wide as the original confidence interval.(E) The second…
a. interpret the corresponding 95% confidence intervals for both Birth weight and Age. b. What is the predicted average SBP of an infant born with birth weight 8lbs (128oz) measured at 3 days old? c. Calculate the Pearson correlation between Age and Birth weight, and test if this correlation is significant at the 0.05 level. Does this answer surprise you, why or why not?
An article wanted to look at the compression strength of aluminum cans filled with strawberry drinkand another sample filled with cola.(a) Does the following data suggest that the extra carbonation of cola results in a higher averagecompression strength? Base your answer on a P-value. What assumptions are necessary for youranalysis?(b) Develop a 90% confidence interval of the difference of compression strength between the twobeverages. Beverage Sample size SampleMean SD Strawberry drink 15 540 21 Cola 15 554 15
A study of 420,035 cell phone users found that 0.0326% of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0331% for those not using cell phones. Complete parts (a) and (b).Question content area bottomPart 1a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.enter your response here%<p<enter your response here%(Do not round until the final answer. Then round to three decimal places as needed.)Part 2b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell phones? Why or why not?A.Yes, because 0.0331% is not included in the confidence interval.B.Yes, because 0.0331% is included in the confidence interval.C.No, because 0.0331% is included in the confidence interval.D.No,…
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