In 1945​, an organization asked 1540 randomly sampled American​citizens, "Do you think we can develop a way to protect ourselves from atomic bombs in case others tried to use them against​ us?" with 797 responding yes. Did a majority of the citizens feel the country could develop a way to protect itself from atomic bombs in 1945​? Use the α=0.01 level of significance. Determine the test​ statistic, z0 & find the P-Value.

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

A: Hypotheses: Let p1 denote the proportion of children who have ear infections at one school and p2…

Q: in a Gallup poll of 1003 randomly selected subjects, 370 said they have a gun in their home. The…

A: The z statistic is Z=(p-mean)/standard deviation Thus, the z statistic is -2.01

Q: An online poll​ asked: "Do you believe the Loch Ness monster​ exists?" Among 20 comma 675…

A:

Q: In a rural area, only 30% of the wells that are drilled find adequate water within a depth of 100…

A: Given: x = 27 n = 80 p0 = 0.3 α = 0.10

Q: Children of three different ages (5 years, 7, years, and 9 years) were given a list of 5 different…

A: From the provided information, The hypotheses can be constructed as: H0: The distribution of animal…

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

A:

Q: Kevin, a Human Resources professional, would like to make the claim that the average hourly wage for…

A: μ=$9.69 per hour α=0.01

Q: O asked 1439 randomly sampled American citizens, "Do you think we can develop a way to protect…

A: Given that  Sample size n =1439 Favorable cases x =766 Sample proportion p^=x/n  =766/1439 =0.5323

Q: The sales rep of a waterbed claims that 25% of the Filipino died because of cardiovascular diseases.…

A:

Q: A builder claims that bidets are installed in 70% of all homes being constructed today in suburban…

A: A builder claims that bidets are installed in 70% of all homes being constructed today in suburban…

Q: One hundred normal weight people and 100 obese people were observed at several Chinese food buffets.…

A: Given Information:   Normal weight Obese Used Chop Sticks 26 7 Used Knife and fork 74 93…

Q: 85% of all restaurants fail after one year. Is that number different for Chinese restaurants? Out of…

A: Here we need to find the critical value associated with the given hypothesis test. Here the claim is…

Q: Consider the following scores of 10 takers in a 20-item special test in Stat 1A as follows: 15, 11,…

A: Solution:  The scores of 10 takers in increasing order are 5, 6, 8, 9, 10, 11, 11, 12, 15, 17 n= 10…

Q: A simple random sample of size n= 200 drivers with a valid driver's license is asked if they drive…

A: Solution: Given information: n= 200 Sample size x =119 success p^=xn=119200= 0.595 Sample proportion…

Q: A table represents the possibility of an association between hair color and eye color. Eye Color…

A:

Q: A chi-square test for homogeneity was conducted to investigate whether the four high schools in a…

A: Given:  p-value of the test = 19.02 and 0.025

Q: In a certain school district, it was observed that 24% of the students in the elementary schools…

A: From the given information, The population proportion is 0.24 56 out of 193 students are only…

Q: In a random sample of 400 electrical components, 88 are found to be defective. If the hypothesis is…

A: Since, there is only one sample, them the z-test for one sample is used. Here,  n=400p^=88400=0.22…

Q: Consider a sample of 45 football​ games, where 26 of them were won by the home team. Use a 0.01…

A:

Q: In a simple random sample of 78 NCAA Division III Football games, the team that scored first won the…

A: Denote p as the true proportion of teams that scores first, win the game.

Q: An agency that hires out clerical workers claims its workers can type, on average, at least 60 words…

A: If the mean typing speed of workers from the agency is less than 60 wpmwpm, the probability of…

Q: 1. In SUKI market, 65% of the vendors preferred to use plastic over paper bags. After the local…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: In a controlled laboratory experiment, scientists at the University of Minnesota discovered that 25%…

A: 1. Let x denote the number of rats that develop tumor. Given: x=16n=48p=0.25α=0.05 Hypothesis: Null…

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

A: Given Information: Sample size of men (n1) = 200  Sample size of women (n2) = 200  Proportion of men…

Q: With domestic sources of building supplies running low several years ago, roughly 60,000 homes were…

A:

Q: The french naturalist buffon tossed a coin 4040 times and obtained heads 2048 times ( A) use…

A: Given, n = 4040 x = 2048 α = 0.01 proportion for obtainned head is p1 = xn= 20484040 = 0.5069     To…

Q: An online poll​ asked: "Do you believe the Loch Ness monster​ exists?" Among 20 comma 47820,478…

A: From the given information, the claim of the problem is “most of the people believe that the Loch…

Q: In 1995, it was determined that 78% of US citizens supported a ban on household aerosols.  Thinking…

A: Given that p=78%=0.78

Q: An article reported the folloving frequencies with which ethnic characters appeared in recorded…

A: We have given that  Four groups of Ethnical : African American, Asian, Caucasian, Hispanic  And…

Q: In a random sample of soldiers who fought in the Battle of Preston, 774 soldiers were from the New…

A: The hypotheses are given below: Null hypothesis: H0:p=0.25 Alternative hypothesis: H1:p>0.25 The…

Q: An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans…

A: p^=xn= 2255= 0.40

Q: The National Cyber Security Alliance claims that 85% of computer owners believe that they have a…

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

Q: A college administrator wanted to know if the proportion of students who request online classes, lab…

A: From the given information the p-value of 0.1347 and the level of significance is 0.05.

Q: In 1945, an organization asked 1511 randomly sampled American citizens, "Do you think we can develop…

A:

Q: Among 200 randomly selected Internet users, it was found that 89 of them use the Internet for making…

A:

Q: Find the missing values in the following ANOVA TABLE for a study that consist of 5 treatments with…

A: For the given data Find  dfbetween=? MSbetween? SSWithin=? dfwithin=? MSwithin=? SStotal =? dftotal…

Q: 14) m a study of 400,095 American cell phone users, 3000 subjects developed cancer of the brain.…

A:

Q: A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2887…

A: As due to the honor-code, we are authorized to answer only 3 subparts for each question and that you…

Q: random sample of soldiers who fought in Ahe Battle of Preston, 774 soldiers were from the New Model…

A: Given that, Sample size of soldiers n=1000 Sample proportion of soldiers who are from Royalist army…

Q: 65. A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would…

A: Introduction: The null hypothesis assumes that the mean commuting mileages are the same for the…

Q: 4. In a random sample of 75 college students, 16 are found to have cars on campus. Test the…

A: Given that  X=16 , n=75 , p=0.4 Note: According to bartleby experts question answers guidelines an…

Q: US Universities found that 72% of people are concerned about the possibility that their personal…

A:

Q: A pharmacist claims that more than 60% of all customers simply collect a prescription. One of her…

A: Hypotheses: Here p be the proportion of customers simply collect a prescription. The aim is to check…

Q: In a study, a sample of 546 boys aged 6-11 was weighed, and it was determined that 89 of them were…

A:

Q: In a previous​ poll, 43​% of adults with children under the age of 18 reported that their family ate…

A: It is given that the hypothesized population proportion (p) is 0.43 and the sample size is 1145 and…

Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…

A: The level of significance is 0.01.

Q: A bank has a policy that the proportion of loans made to people with more than $50,000 in debt…

A: The hypotheses for the test are given below. Null hypothesis: H0: p ≤ 0.15 Alternative hypothesis:…

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A:

Q: A recent survey in the N.Y. Times Almanac indicated that 48.8% of families own stock. A broker…

A:

Q: A company claims that less than 30% of people who both work and live in Newcastle. A study revealed…

A: p̂=x/n,  X=62, n=200, p=0.30 we want to test the hypothesis

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.