A medical researcher says that less than 79% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 300 adults in that country, 77% think that healthy children should be required tevaccinated. At a=0.10, is there enough evidence to support the researcher's claim? Complete parts (a) through (e) below.(b) Find the critical value(s) and identify the rejection region(s).Identify the critical value(s) for this test(Round to two decimal places as needed. Use a comma to separate answers as needed.)Identify the rejection region(s). Select the correct choice below and fill in the answer box(es) to complete your choice.(Round to two decimal places as needed.)O A. The rejection region is z>.O B. The rejection regions are z<and z>O C. The rejection region is

The given claim is that less than 79% of adults in a certain country think that healthy children…

Answered: A medical researcher says that less…

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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You conduct an ANOVA test to determine whether rap, folk, country, or pop music genres record their music using more layers of sound. You calculate your F-value at an alpha of 0.05 and the appropriate degrees of freedom and it is 7.23. You find the critical value from the appropriate F-table and it is 7.56. Is it true or false that you reject your null hypothesis of no difference in the number of sound layers found in songs from the abovementioned music genres? 3) One challenge with ANOVA is that: a) The alternative hypothesis doesn't specify which categories differ from which b) The null hypothesis doesn't specify which categories differ from one which c) The test is not very robust to heteroscedacity d) The test is not very robust to deviations in normality
The processing of raw coal involves “washing,” in which coal ash (nonorganic, incombustible material) is removed. The article “Quantifying Sampling Precision for Coal Ash Using Gy’s Discrete Model of the Fundamental Error” (Journal of Coal Quality, 1989:33–39) provides data relating the percentage of ash to the volume of a coal particle. The average percentage of ash for six volumes of coal particles was measured. The data are as follows: Volume (cm3) 0.01 0.06 0.58 2.24 15.55 276.02 Percent ash 3.32 4.05 5.69 7.06 8.17 9.36 Using the most appropriate model, predict the percent ash for particles with a volume of 48 cm3. Round answer to three decimal places.
A random sample of 28 records of automobile driver fatalities in kit carson coybry showed 15 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alochol is less than 77%. Use a=0.01 to determine the test statistic, the critical value, and p value.
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 0.38. Suppose a random sample of 112 traffic fatalities in a certain region results in 52 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 = 0.1 level of significance? Because npo (1-Po) = (Round to one decimal place as needed.) What are the null and alternative hypotheses? 10, the sample size is Ho: versus H₁: (Type integers or decimals. Do not round.) Find the test statistic, Zo. Find the P-value. P-value = Zo (Round to two decimal places as needed.) = the requirements for testing the hypothesis 5% of the population size, and the sample satisfied. (Round to three decimal places as needed.)
You predict that a salesclerk at the mall will take longer to help a potential customer that is dressed in sloppy clothes vs a potential customer dressed in business attire. After running the study you find support for your hypothesis with the obtained value exceeding the critical value at the p < .05 level. Why wouldn't you want to say that you proved your hypothesis correct? What other sources might be a better explanation for your findings?
In an area where there is no radioactive fallout, 1% of newborns show genetic disorders. Genetic disorders were observed in 150 out of 10000 babies born in a year in a region with radioactive fallout as a result of atomic bomb trials.Test whether radioactive fallout increases the rate of genetic defects at α = 0.05 significance level.
Define the critical region for a hypothesis test, and explain how the critical region is related to the alpha level.
In a survey of 470 drivers from the South, 404 wear a seat belt. In a survey of 360 drivers from the Northeast, 292 wear a seat belt. At α=0.07, can you support the claim that the proportion of drivers who wear seat belts is greater in the South than in the Northeast? Assume the random samples are independent Find the critical value(s) and identify the rejection region(s).
Show all your work Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. Researchers are studying two populations of sea turtles, In population D. 30 percent of the turties have a shell length greater than 2 feet. In population E. 20 percent of the turtles have a shell length greater than 2 feet. Froma random sample of 40 turtes selected from D.15 had a shell length greater than 2 feet. From a random sample of 60 turtles selected fromE. 11 had a shell length greater than 2 feet. Let pry represent the sample proportion for D, and let p represent the sample proportion for E (a)What is the value of the difference pryPr?Show your work. (b) What are the mean and standard deviation of the sampling distribution of the difference in sample proportions p P:? Show your work and label each value. (c) Can it be assumed that the sampling distribution of the difference of the…
A group of toxicologists investigated the impact of exposure to low oxygen on the mortality of rice weevils. In an experiment, 31,386 of 31,421 rice weevils were found dead after exposure to nitrogen gas for 4 days. In a second experiment, 23,516 of 23,676 rice weevils were found dead after exposure to nitrogen gas for 3.5 days. Conduct a test of hypothesis to compare the mortality rates of adult rice weevils exposed to nitrogen at the two exposure times. Is there a significant difference (at a = 0.10) in the mortality rates? Give the null and alternative hypotheses. Let p, represent the proportion of rice weevils found dead in the first experiment and p, represent the proportion of rice weevils found dead in the second experiment. Choose the correct answer below. O A. Ho: (P1 - P2) #0 Ha: (P1 - P2) = 0 O C. Họ: (P1 - P2) 0 H3: (P1 - P2) = 0 OF. Ho: (P1 - P2) =0 H: (P1 - P2) >0 Find the test statistic. The test statistic is z=. (Round to two decimal places as needed.)
(a) Identify the claim and state H0 and Ha. (b) Use technology to find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic, t. (d) Decide whether to reject or fail to reject the null hypothesis. (e) Interpret the decision in the context of the original claim.
We want to use a z-test to determine if the sample mean is greater than 20 at the alpha = 0.05. What is the critical value(s)?

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