Of 520 samples of seafood purchased from various kinds of food stores in different regions of a country and geneticallycompared to standard gene fragments that can identify the species, 81% were mislabeled.a) Construct a 95% confidence interval for the proportion of all seafood sold in the country that is mislabeled ormisidentified.b) Explain what your confidence interval says about seafood sold in the country.c) A government spokesperson claimed that the sample size was too small, relative to the billions of pieces of seafoodsold each year, to generalize. Is this criticism valid?a) What is the 95% confidence interval?The 95% confidence interval is from 85.6 % to 92.4%.(Round to one decimal place as needed.)

Given Sample size n=520 Sample proportion P=0.81

Answered: Of 520 samples of seafood purchased…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A genetic experiment with peas resulted in one sample of offspring that consisted of 406406 green peas and 158158 yellow peas. a. Construct a 9595% confidence interval to estimate of the percentage of yellow peas. b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
study of 420,077 cell phone users found that 133 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 0.0236% for those not using cell phones. Complete parts (a) and (b). a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.
In a study of the relationship between alcohol use and bicycling fatalities, the researcher investigated 100 fatal bicycle accidents in which the rider was male. Thirty-five of these males tested positive for alcohol. Construct the 95% confidence interval for the population proportion?
In a recent year, a sample of the South American Redeye Piranha was collected by fishermen on a particular river. Wildlife biologists regard this sample as a random sample of all Redeye Piranha in that river. The mean length of the 60 fish in the sample was 12.88 cm, and a 99% confidence level for the true mean length of all Redeye Piranha in that river is 12.09 cm to 13.67 cm. Explain what would happen to the length of the interval if the confidence level were decreased to 95%.
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Researchers from a national research organization investigated which platform (television, social media, newspaper, Internet, etc.) United States adults prefer to use to obtain their news. In 2016, of the 200 randomly selected United States adults that were surveyed, 114 selected television as their preferred platform. In 2018, of the 200 randomly selected United States adults that were surveyed, 98 selected television as their preferred platform. The conditions for inference are met. A 95 percent confidence interval for the difference in the population proportions of United States adults that use television as their preferred platform for obtaining news between 2016 and 2018 (2016 minus 2018) was found to be (-0.02, 0.18). Based on the interval, is it reasonable for the researchers to claim that there is convincing statistical evidence that the population proportion of United States adults that use television as their preferred method to obtain news differed between 2016 and 2018? (A)…
An apartment hunter is shopping for either a one-bedroom or two-bedroom apartment in varying apartment buildings. She wants to estimate the additional amount she would have to pay, on average, for a two-bedroom apartment versus a one-bedroom apartment. The table shows the prices, in dollars, for one- and two-bedroom apartments from the nine buildings she visited. A 95% confidence interval for the true mean difference between two-bedroom and one-bedroom apartments for apartment buildings like the ones in the sample was (255.93, 508.51). A friend of the apartment hunter tells her to expect to pay about $500 more per month for a two-bedroom apartment than for a one-bedroom apartment. Does the confidence interval provide evidence for the friend’s claim? A. No, the confidence interval does not contain 0, so the friend’s claim is not plausible. B. No, the confidence interval contains many more numbers below 500 than above 500, so it is unlikely that the friend’s assertion is correct. C.…
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Data collected by a behavioral risk factor surveillance group revealed that in a state, 27.9% of whites and 47.9% of blacks were cigarette smokers. Suppose these proportions were based on samples of 3584 whites and 486 blacks. a) Create a 95% confidence interval for this difference. b) Does this survey indicate a race-based difference in smoking among American adults? Explain, using your confidence interval to test an appropriate hypothesis. c) What alpha level did your test use? a) Let p, be the sample proportion of whites who were cigarette smokers and p, be the sample proportion of blacks who were cigarette smokers. Create a 95% confidence interval for the difference between the two proportions, p, -P2- (Round to three decimal places as needed. Use ascending order.) b) State the hypotheses for the test. Ho HA (Type integers or decimals. Do not round.) State the conclusion. Since the interval V 0. the null hypothesis. This study O V evidence of a race-based difference in smoking…
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According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the proportion of California residents who reported insufficient rest or sleep during each of the preceding 30 days is 8.0%, while this proportion is 8.8% for Oregon residents. These data are based on simple random samples of 11,545 California and 4,691 Oregon residents. Calculate a 95% confidence interval for the difference between the proportions of Californians and Oregonians who are sleep deprived and interpret it in context of the data. Also, conduct a hypothesis, with alpha = 0.05, test to determine if these data provide strong evidence the rate of sleep deprivation is different for the two states. Construct a 95% confidence interval Which of the following correctly displays the standard error? 0.0046 0.009 0.001 0.00002 0.008

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