A company claims that its new viral vaccine is at least 90% effective in preventing a contagious viral disease. Suppose that in a clinical trial with 3000 respondents, 2640 did not get infected by this disease. At 1% level of significance, Is the claim of the company valid or not valid?

Q: A university dean is interested in determining the proportion of students who recieve some sor of…

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Q: A researcher designs an experiment in which the single independent variable has five levels. If the…

A: Given A researcher designs an experiment in which the single independent variable has five levels.…

Q: Suppose 4 percent of the children in the US are thought to be near the juvenile diabetes threshold.…

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Q: In a random survey of 1,000 households in the United States, it is found that 29 percent of the…

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Q: In a survey of 399 randomly selected households conducted in the U.S., it was found that 158 of the…

A: Given, The objective is to find the best point estimate of the proportion of households that have…

Q: Last year, television station WXYZ's share of the 11 P.M. news audience was approximately equal to,…

A: Introduction :-  Given :-  Surveyed a random sample of 400 11PM news viewers and found that 146…

Q: In a study to estimate the proportion of smokers among the residents in a certain city and its…

A: To testH0:p1=p2H1:p1≠p2

Q: In 2000, 58% of females aged 15 and older lived alone, according to the U.S. Census      Bureau. A…

A: State the hypotheses. That is, there is no sufficient evidence to conclude that proportion has…

Q: A study showed that 66% of supermarket shoppers believe supermarket brands to be as good as national…

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Q: In an October 2003 poll conducted by the Gallup organization, 684 of 1006 randomly selected adults…

A: Point estimate:The point estimate of population proportion is sample proportion.

Q: A factory for the production of light bulbs took a random sample of 200 units and found that 18 of…

A: The sample size is N=200N = 200 the number of defective cases is X=18X = 18 and the sample…

Q: The American Association of Individual Investors (AAII) conducts a weekly survey of its members to…

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Q: Of the 1,009 adults surveyed, 676 responded “yes.” In December 2007, 622 of 1,020 randomly selected…

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Q: In a sample of 167 children selected randomly from one town, it is found that 37 of them suffer from…

A: Sample size n = 167 And number of children who suffer from asthma, X = 37 Let p be the proportion of…

Q: n New York City, a study was conducted to evaluate whether any information that is available at the…

A: (a) Obtain the sample size of a preliminary estimate for p is 0.10 with the 95% confidence. The…

Q: Did the samples shown most likely come from the same population, or two different populations? If…

A: Given :

Q: In a random sample of 1000 persons from U.P. 510 were found to be consumers of cigarettes. In…

A:

Q: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students…

A: Introduction:Denote p̂ as the true proportion of the college students who attended the opening night…

Q: A poll of 80 students selected at random at Midtown University found that 20 were in favor of a fee…

A: Given  Total student in sample = 80 students No. of student in favour of feet hike = 20 students

Q: In a sample of 137 leopards selected randomly from one preserve, it is found that 7 of them have…

A: H0 : p = 0.13 H1: p ≠ 0.13

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A: given information: let us consider x : potential voters prefers the democratic candidate.…

Q: Many elementary school students in a school district currently have ear infections. A random sample…

A: Given X1=11 X2=12 n1=40 n2=30

Q: A national publishing house claims that 27% of all weekly magazine readers in South Africa read…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: A national publishing house claims that 35% of all weekly magazine readers in South Africa read…

A: Given: Significance level = 0.05, Population proportion = p = 0.35, Sample size  = n = 500, Number…

Q: According to a recent poll, 53% of Americans would vote for the incumbent president. If a random…

A: Null hypothesis : H0 : μ = 0.53 Alternative hypothesis : Ha : μ ≠0.53 It is two tailed test.

Q: If you draw a random sample of 100 scores from a large population of test scores and compute the…

A: As we increase z value, corresponding probability of occurence decreases. hence, The event among…

Q: In a survey of 1005 adult Americans, 46% indicated that they were somewhat interested or very…

A: Introduction: Denote p as the true proportion of people from Country A who are somewhat interested…

Q: According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange…

A: Given that sample size n = 120 Number of persons who have been arrested, X = 48 Level of…

Q: In a clinical study of an allergy drug, 108 of the 200 subjects reported experiencing significant…

A: Solution: Note: Hello! As you have posted 2 different questions, we are answering the first question…

Q: A dentist hypothesizes that the average time a child spends brushing their teeth is less than 60% of…

A: In the given situation, the claim of the problem is "the average time a child spends brushing their…

Q: le of teenage drivers living in Dover City for H0: p = 0.50 and Ha: p < 0.50, where p is the…

A: Given: Hypothesis: H0 : p=0.50Ha : p&gt;0.50 Sample size, n = 150 Level of significance, α=0.05 Part…

Q: In a certain school district, it was observed that 25% of the students in the element schools were…

A: It is given that 25% of the students in the element schools were classified as only children. Thus,…

Q: The American Association of Individual Investors (AAII) conducts a weekly survey of its members to…

A: a. Given: n=300, p=0.332 The null and alternative hypothesis is, H0:P=0.385Ha:P≠0.385 The test…

Q: 4. Out of 450 randomly selected people in a soccer match, 225 of them were students. Compute the…

A: 450 people are selected randomly; n=450 225 of them were students; x=225

Q: Suppose a marriage counselor believes that the proportion of married couples with three personality…

A: The provided information are:

Q: An organization published an article stating that in any one-year period, approximately 11.5 percent…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: The National Association of Home Builders reported that 57 % of young people ages 18-24 wereliving…

A: According to the provided information, 57% (p) of young people ages 18-24 were living with their…

Q: (a-1) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your…

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Q: A nonprofit company concerned with the school dropout rates has designed a tutoring program aimed at…

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Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

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Q: In a survey of families in which both parents work, one of the questions asked was, "Have you…

A: Given that n1=n2=200 P1= number of percent of men who said yes P2= number of percent of women who…

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A:

Q: A poll asked 946 adults​ "If purchasing a used car made certain upgrades or features more​…

A: Given: Population size(N) = 946 1] Group 1 For males: sample size(n1) = 473 Proportion of males (π1)…

Q: In a previous poll, 38% of adults with children under the age of 18 reported that their family ate…

A: Given, The sample proportion is, The null and alternative hypothesis is:

Q: In a sample of 88 children selected randomly from one town, it is found that 8 of them suffer from…

A: Given information- Sample size, n = 88 It is found that 8 of them suffer from asthma. So, x = 8 So…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: From the provided information, Sample size (n) = 1432 Out of which 321 complaints of identity theft.…

Q: In a national survey of 2013 adults, 1283 indicated that they believe rudeness is a more serious…

A: Given that

Q: A health insurance company wants to determine if more than 25% of US residents have been to a…

A:

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A: Given: n = 89, x = 52, α = 0.05, p = 0.59. Sample proportion: p^=xn=5289=0.5843

Q: 2. In a certain special education school, a sample of 144 students was chosen and among these, 48…

A: Claim : proportion of ADHD students in the school is not 0.40.