A tv report conducted a survey of 681 people in Washington state and found that 26% of the population believe that Mt Saint Helen's will have a repeat eruption this year.  In the accompanying dialogue, the reporter states,  we are 91% confident that the true proportion of people in Washington state who believe that Mt saint Helen's wil have a repeat eruption this year lies between 20% and 32%. What does 91% represent in the report?

Q: 2) A recent online poll posed the question "Should female athletes be paid the same as men for the…

A: Answer: Yes. We can trust the result.

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Givensample size(n)=265x=216p^=xn=216265=0.815α=0.10

Q: According to a Gallup survey two years ago, 32% of American households use a computer or online…

A: From the provided information, Sample size (n) = 85 Sample proportion (p̂) = 0.36 Level of…

Q: Before the Christmas shopping rush began, a department store had noted that the percentage of…

A:

Q: In a survey of 500 residents in a certain town, 274 said they were opposed to constructing a new…

A: The claim is that more than half of the residents are opposed to constructing a new shopping mall.…

Q: If you use the Internet, have you ever paid to access or download music? This was one of the…

A: The sample size = 1003 From the sample, the information we have, No. of adults do not use internet =…

Q: The manager of a library that is open to residents of two towns, Royal Center and Winamac, wants to…

A:

Q: The State Superintendent of Schools consistently states that the average salary of all substitute…

A: Given Information: Sample size (n) = 8 The state superintendent of schools states that the average…

Q: At the 5% level, is there enough evidence to show that the proportion of Australians in November…

A: It is given that Sample size n = 631 Number of Australian thought unemployment would increase, X =…

Q: Would an observational study or an experiment be more appropriate for a medical research team that…

A: Experiment and observational studies are used in statistics.

Q: In a​ poll, 1,001 men in a country were asked whether they favor or oppose the use of​ "federal tax…

A: The population in the given​ problem C. All men in the country

Q: A researcher concluded that a patient was in the risk group of developing a rare disease based on…

A: Solution: Here, hypotheses for this test can be written as follows: H0: A patient was NOT in the…

Q: Two neurologists examined 55 magnetic resonance imagings (MRIs) for evidence of brain tumors. As…

A: Percentage agreement expected is given by, PEexpected= (total of row 1 * total of column1/N + total…

Q: Suppose an individual applying to AUA determines that he has an 80% chance of being accepted, and he…

A: Let event A represent students being accepted. Let event B represent receiving dormitory housing.…

Q: Suppose a marketing company did do a survey. They randomly surveyed 200 households and found that in…

A: Given data, n=200 x=120 Population proportion p=?

Q: Among college students, the proportion p who say they're interested in their congressional…

A: The random variable interest rate follows normal distribution. We have to test whether the…

Q: A labour analyst surveys a random sample of 40 females and 40 males who are currently not working…

A:

Q: Suppose the marketing company did a survey. They randomly surveyed 145 households and found that in…

A: Solution As per guidelines we answer the three subparts only.

Q: 1) State the null and alternative hypotheses using the appropriate notation. 2) Calculate the test…

A: a) The test wants to see if the population proportion differs between the two provinces. Thus, we…

Q: According to a poll conducted by the Gallup Corporation in March 2011, the metropolitan areas with…

A: Given, according to a poll conducted by the Gallup Corporation in March 2011, themetropolitan areas…

Q: A state highway commission is considering removing the lane that allows people to pay cash for a…

A: Given Information :  A state highway commission is considering removing the lane that allows people…

Q: Suppose you asked a sample of individuals if they are a Republican, Democrat, or Independent and…

A: Two way chi square

Q: In a poll, each of a certain number of American adults was asked the question "If you had to choose,…

A: The given information's are P(F)=0.31P(L)=0.48P(H)=0.24 i) P(F)=0.31 it is given in the question it…

Q: Among college students, the proportion p who say they're interested in their congressional…

A: Given X=185 n=260

Q: The Gallup organization surveyed 1100 adult Americans on May 6-9, 2002, and conducted an independent…

A: The conditions for two proportion is to be satisfied is: The two samples are random samples and…

Q: A survey on a sample of 25 cars being sold at a local auto dealer was conducted to see which of…

A: Let, S: Sample A: Air-conditioning B: Radio C: Power windows n(S)=25, n(A)=15, n(B)=12, n(C)=11,…

Q: 2. A hot topic of debate is whether the legal driving age should be raised to eighteen. From a…

A:

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

A: If the value of sample size is more than 30, then we say that it is a large sample test. Once we…

Q: Affiliation Option Democrat Republican Independent Cut 101 282 61 Raise 38 67 25 Inflate 131 88 31…

A: The following information has been given: Observed Frequencies:   Democrat Republican Independent…

Q: A survey is conducted on the use of Facebook of adults in the United States, where 12,000 adults are…

A: Population of a survey means the entire group on which we are taking survey. Sample is a specific…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Given:  Among the college students the proportion p who say they’re interested in their…

Q: In a recent poll about a Green New Deal, 1025 respondents were asked the following question: Would…

A:

Q: 3. In a study done in Michigan, it was determined 38 (out of 62) poor children who attended…

A: given that

Q: A researcher claims that the percentage of voters that favor voting via absentee ballot is 35%.…

A: It is given that the researcher claims that the percentage of voters that favor voting via absentee…

Q: In a study at Quaid-i-Azam University, it is reported that seven percent student play football,…

A: Let event A represent students who play football and event B represent students who play cricket.…

Q: Among college students, the proportion p who say they're interested in their congressional…

A:

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Givensample size(n)=255x=172p^ =172255=0.675α=0.05

Q: The University is considering changing the email system that they currently use. Since there are…

A: We have to find null and alternative hypothesis for given data..

Q: 4. In a survey of families in which both parents work, one of the questions asked was, “Have you…

A: Solution: 4. Let p1 be the proportion of men has refused a job, promotion, or transfer and p2 be the…

Q: “In a recent survey, 63% of decided voters said they would vote for the mayor in the next election.…

A: The confidence interval for population proportion is given by; p^-ME,p^+ME where, ME=zα/2p^(1-p^)n

Q: Childhood vaccinations: In January 2015, the Pew Research Center reported results from one of their…

A: It is given that 68% of adults say such vaccines should be required.

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: From the provided information, Sample size (n) = 250 From which 180 students say they’re interested…

Q: A nonprofit organization conducted a survey of 2140 metropolitan-area teaches regarding their…

A: Given, Let us consider, P is the set of teachers who said the lack of parental support is problem. N…

Q: According to a New York Times/CBS poll, 76% agreed that it should be the government's responsibility…

A: It is given that 76% agreed that it should be the government's responsibility to provide a decent…

Q: State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of…

A: Given that  Sample size n =270 Favorable cases x =194 Sample proportion p^=x/n  =194/270 =0.7185…

Q: Among students at a nearby college, the proportion who say they’re interested in their congressional…

A:

Q: Kentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that…

A: Given  People in Kentville : 10000 People in Lanesburg : 25000 People died of Kryptonosis last year…

Q: In recent years, many states have enacted tougher voter identification laws requiring a government…

A: (1)   Obtain the 95% confidence interval for the proportion of adults who approve of tougher voter…

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.…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.