An airline's public relations department says that the airline rarely loses passengers' luggage. It further claims that on those occasions when luggage is lost, 91% is recovered and delivered to its owner within 24 hours. A consumer group who surveyed a large number of air travelers found that only 120 of 195 people who lost luggage on that airline were reunited with the missing items by the next day Does the result of the survey doubt on the airline’s claim? Test an appropriate hypothesis and state your conclusion at 5% significance level. aState the null and alternative hypotheses:      bGive the test statistic: c Decision and Conclusion:

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: Suppose that the unemployment rate for 18- to 34-year-olds was reported to be 10.6%. Assume that…

A: Given, The unemployment rate for 18- to 34-year-olds was reported to be 10.6% based on a random…

Q: (a) Find the mean of p. (b) Find the standard deviation of p. (c) Compute an approximation for P…

A:

Q: In the state of Kentucky, there are 228 eight year olds diagnosed with ASD out of 18,462 eight year…

A: In the state of Kentucky, there are 228 eight year olds diagnosed with ASD out of 18,462 eight year…

Q: An article estimated that 80 percent of students at a large public university who are Facebook users…

A: According to the given information in this question, we need to identify the correct option

Q: The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levels in…

A: GivenLead levels rangin from 47 to 660Minimum value = 47Maximum value = 660Margin of…

Q: A company sells its product line in traditional brick and mortar stores as well an online store…

A: Solution: The Minitab output for one proportion is given.

Q: How do you get online? A 2013 Pew Research survey of802 teens found that, among teens aged 12–17,…

A:

Q: In the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect…

A: Given n(sample size)=316 x( no. of success) =154

Q: An SMR over 100% ( i.e.,171 %) indicates that the "healthy worker effect" may be an issue in the…

A: Given::- An SMR over 100% (i.e., 171%) indicates that the "healthy worker effect" may be an issue in…

Q: Do sports drinks help prevent cramps in endurance sports? At the end of a marathon, officials will…

A: Observational study: In observational study, the individuals of the study are observed by the…

Q: In the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect…

A: The claim of the NFL team owners is, "proportion of calls in which referees were wrong is more than…

Q: n the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect call…

A: Given: α=0.05   z% CI or confidence interval means, if we take the measure repeatedly from the…

Q: A poll found that 83% of American adults believed that there was a conspiracy in the death of…

A: Given  Population proportion p=0.83, X=869, n=sample size=1060 Level of significance ɑ=0.10

Q: In 2006 the GSS had a special topic that investigated disabilities. They asked respondents if they…

A: Favorable cases (x) = 265 and sample size (n) = 2749 Then,  We will find the point estimate of the…

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: Reach out to a family member, older friend, or another professor and ask them whether they feel that…

A: Larger samples tend to be more accurate than smaller samples if the samples are chosen randomly. The…

Q: Suppose that a recent report from the Current Population Survey (CPS) of the United States Census…

A: The question is about hypo. testing Given : Null and alt. hypo : H0 : p = 0.46 H1 : p > 0.46…

Q: The General Social Survey determined in 2016 that 57% of US Residents think that the use of…

A:

Q: According to previous studies, 10% of the U.S. population is left-handed. Not knowing this, a high…

A: The following solution is provided below

Q: Use these results from a USA Today survey in which 510 people choseto respond to this question that…

A:

Q: tourists

A: Here hypothesis testing of proportion

Q: Twittering away The Pew Internet and American Life Project asked a random sample of 2253 U.S.…

A: Given Information: Sample size n=2253 Sample proportion p^=0.19

Q: You would like to estimate the proportion of all residents in favor of a new law with 98%…

A: The sample proportion is 0.30, margin of error is 0.06, and the confidence level is 98%. Computation…

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Note: Hi there! Thank you for posting the question. Unfortunately in the sub-part(b), some required…

Q: (a) Estimate the number of visitors in the sample who actually are looking for the company's website…

A: Not all visitors to a certain company's website are customers or potential customers. In fact, the…

Q: Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of…

A: The given values are:Sample size (n) = 24Sample mean (x̄) = $28,500Population standard deviation (σ)…

Q: Labor Day was created by the U.S. labor movement over 100 years ago. It was subsequently adopted by…

A: Given : sample size = n = 1000 x = 650 p^ = xn   = 6501000   = 0.65

Q: The British Department of Transportation studied to see if people avoid driving on Friday the 13th.…

A: Given that  Level of significance=0.10   We have to test hypothesis for the claim that  on average…

Q: Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of…

A: The given values are:Sample size (n) = 24Sample mean (x̄) = $28,500Population standard deviation (σ)…

Q: According to a report on consumer fraud and identity theft, 22% of all complaints for a year were…

A: Z test for one proportion has used.

Q: Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of…

A: In hypothesis testing, we start by stating the null hypothesis (H0) and the alternative hypothesis…

Q: John Paul teaches five sections of Introductory Psychology. He wants to know whether or not the…

A: Anova is the parametric test. It used to test whether the mean significance between the groups. It…

Q: TechBuzz is an IT company that monitors the status of large data warehouses. According to TechBuzz,…

A: In a sample of 190 servers, 142 servers are over-utilized. Therefore, the sample proportion of…

Q: 12.2.84 The number of successes and the sample size for a simple random sample from a population are…

A: Note:  Hey, since multiple questions are posted, we will answer first question for you. If you want…

Q: In 2013, 46% of high school students tried a tobacco product. From a survey of 500 randomly…

A: Given : Population proportion =46% n=500

Q: Labor Day was created by the U.S. labor movement over 100 years ago. It was subsequently adopted by…

A: Given : The number of adults who said yes = 650

Q: An issue of Time Style and Design reported on a poll conducted on the shopping habits of wealthy…

A: Given data number of success , x= 410.0 sample size, n = 603 population…

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.