The anime club at IVC conducts a survey to determineif people prefer watching anime series with voicedubbing or subtitles. The data is listed in the tablebelow. Is there compelling statistical evidence tosupport the claim that students prefer dubbing oversubtitles (first group rate higher than second grouprate)?Test and CI for Two ProportionsSampleSample X NVoiceDubbingSubtitles23900.25638850.447 Pooled Proportion(p-bar)Test StatistiC, ZP-valueSignificance levelConclusion>>>><>

Answered: The anime club at IVC conducts a survey…

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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The sales rep of a waterbed claims that 25% of the Filipino died because of cardiovascular diseases. A researcher wants to test this claim. A hospital record shows that out of a random sample of 200 dead patients, 55 patients died because of cardiovascular diseases. Does the data provide sufficient evidence to support the claim of the sales rep? Use 0.03 level of significance.
A geneticist conducted a hybridization experiment with peas, which resulted in offspring consisting of 410 peas with green pods and 150 peas with yellow pods. According to Mendel’s theory, 1/4 of the offspring peas should have yellow pods. Use a 0.05 significance level to test the claim that the proportion of peas with yellow pods is equal to 0.25. Provide answers below.
A random sample of n1 = 291 voters registered in the state of California showed that 150 voted in the last general election. A random sample of n2 = 215 registered voters in the state of Colorado showed that 128 voted in the most recent general election. Do these data indicate that the population proportion of voter turnout in Colorado is higher than that in California? Use a 5% level of significance.
A survey of 30 r/s students in a large college indicated that 19 of them held off-campus jobs. Does this survey result provide strong evidence that more than 50% of all studentsin this college hold off-campus jobs? Use an appropriate p-value to draw and explain your conclusion.
An analysis was conducted by the Statistics Consulting Center atVirginia Polytechnic Institute and State University in which acertain treatment was applied to a set of tree stumps. The chemicalGarlon was used the with the purpose of regenerating the roots ofthe stumps. A spray was used with four levels of GarlonPage 23 of 23concentration. After a period of time the height of the shoots wasobserved. Does the concentration of Garlon has a significantimpact on the height of the shoots? Use α = 0.05.
a study by Consumer Reports showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands. to investigate whether this resultapplies to its own product, the manufacturer of a national name-brand ketchup asked asample of shoppers whether they believed that supermarket ketchup was as good as thenational brand ketchup.a. formulate the hypotheses that could be used to determine whether the percentage ofsupermarket shoppers who believe that the supermarket ketchup was as good as thenational brand ketchup differed from 64%.b. if a sample of 100 shoppers showed 52 stating that the supermarket brand was as goodas the national brand, what is the p-value?
a study by Consumer Reports showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands. to investigate whether this resultapplies to its own product, the manufacturer of a national name-brand ketchup asked asample of shoppers whether they believed that supermarket ketchup was as good as thenational brand ketchup.a. formulate the hypotheses that could be used to determine whether the percentage ofsupermarket shoppers who believe that the supermarket ketchup was as good as thenational brand ketchup differed from 64%.b. if a sample of 100 shoppers showed 52 stating that the supermarket brand was as goodas the national brand, what is the p-value?c. at a = .05, what is your conclusion?d. Should the national brand ketchup manufacturer be pleased with this conclusion?explain.
According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.36. Suppose a random sample of 110 traffic fatalities in a certain region results in 49 that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the α=0.05 level of significance?
In a study to estimate the proportion of residents in a certain city and its suburbs who favor the construction of a nuclear power plant, it is found that 63 of 100 urban residents favor the construction while only 59 of 125 suburban residents are in favor. Is there a significant difference between theproportions of urban and suburban residents who favor construction of the nuclear plant? Use 0.01 level of significance
A random sample of voters found that 180 out of 320 people were in favor of a gas tax. Election results found that 36,000 people voted in favor of the gas tax. Which is a good prediction for the total number of people who voted on the gas tax issue?
According to theElgin Community College website, approximately 56% of ECC students are female. Suppose we wonder if the same proportion is true for math courses. If we collect a sample of 200 ECC students enrolled in math courses and find that 105 of them are female, do we have enough evidence at the 10% level of significance to say that the proportion ofmath students who are female is different from the general population?Use the p-value method.
According to the annual CSI Computer Crime reported 55% of businesses suffered unauthorized use of computer systems by insiders. In a survey taken this year, 324 of a sample of 600 business reported unauthorized use. Test the claim that the proportion of unauthorized usage is less than 55%. Test the claim at 1% significance.

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