The school register estimates that the dropout rate of freshmen high schools in Mindanao is 20%. Last year, 45 freshmen from a random sample of 250 Mindanao freshmen high school withdrew. At 0.01, is there enough evidence to reject the registrar’s claim

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: Given data,The population proportion (P) = 77% = 0.77,Sample size (n) = 28,Number of injured driver…

Q: A dietician read in a survey that 85.36% of adults in the U.S. do not eat breakfast at least 3 days…

A:

Q: In a survey of 1000 women age 22 to 35 who work full time, 540 indicated that they would be willing…

A: Given that, x=540,n=1000 The sample proportion is,

Q: A medical researcher says that at least 23% of Canadian adults are smokers.In a random sample of 200…

A: The null hypothesis is a simple statement about the value of the population parameter which is…

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: Given: p0=0.98α=0.01n=500x=480

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

A:

Q: A survey is conducted to determine the opinions of people on global warming. In a random sample of…

A:

Q: A recent report stated that only 20% of all college graduates find work in the field of their…

A: Given data: Sample size = 400 x = 100 Consider significance level  = 0.05 To test the claim: Does…

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: Based on the Nielsen ratings,the local CBS affiliate claims its 11 PM newcast reaches 41% of the…

A: Given Information: Based on the Nielsen ratings,the local CBS affiliate claims its 11 PM new cast…

Q: A research center claims that 25​% of adults in a certain country would travel into space on a…

A:

Q: In 1965, about 44% of the U.S. adult population had never smoked cigarettes. A national health…

A: Given Information: Population proportion (p) = 0.44 Sample size (n) = 1360  Sample proportion (px) =…

Q: A recent survey found that 68.6% ofthe population own their homes. In a random sample of180 heads of…

A:

Q: A recent study at a local college claimed that the proportion, students who commute more than…

A:

Q: It has been reported that 65% of the U.S. adult population play video games in their leisure time. A…

A: Given that  Sample size n =195 Favorable cases x =125 Sample proportion p^=x/n  =125/195 =0.6410

Q: The Education Ministry claims that the dropout rate for Form 6 students in their country is less…

A: From the provided information, Population proportion (p) = 0.20 The hypotheses can be constructed…

Q: a national survey was initiated and intended to capture the prevalence of HIV in the post-HAART…

A: Given: Sample Sizen=1483 Sample Proportionp^=2411483 Thus p^=0.162508 The standard error is given…

Q: Surgery was performed on 492 patients in the Anywhere Health Care Facility during March, and 27 of…

A: Given information: Total number of patients who received a surgery is 492. Total number of death…

Q: On a normal weekend, 15% of those attending Mass at a local Catholic church donate over $200 per…

A: Consider that pi’s are the proportion of the donations over $200 per week, between $100 and $200 per…

Q: Male penguins that weigh more than 4710 grams are considered "desirable" because the extra fat means…

A: We need to find expected value of desirable penguins Let us find out probability of a desirable…

Q: Twenty-five samples of 100 items each were inspected when a process was consideredto be operating…

A: The given information is that twenty-five samples of 100 times are inspected. In the 25 samples, the…

Q: The percentage of residents ofa certain country who support stricter gun control laws has been 52%…

A: From the provided information, Sample size (n) = 1067 From 599 are in favor of stricter gun control…

Q: An oil company claims that less than 20 percent of all car owners have not tried its gasoline. Test…

A: Stating the appropriate null and alternative hypotheses: The hypotheses are given below: Null…

Q: A union spokesperson claims that 75% of union members will support a strike if their basic demands…

A: From the provided information, A union spokesperson claims that 75% of union members will support a…

Q: What is the predicted score of having a first child when the respondent's age of first marriage is…

A: Given: B0=2B1=1.2

Q: A company claims that 90% of its deliveries arrive on time. You take a sample of 74 deliveries, of…

A: Given,   The sample proportion is,

Q: A recent study at a local college daimed that the proportion, p, of students who commute more than…

A: Given that, x=55,n=265 The sample proportion is,

Q: used their cell phone and 72 of 120 males did so. At the 0.01 level of significance, is there enough…

A: It has been found that many first-time interviewees commit errors that could very well affect the…

Q: The U.S. Department of Energy reported that 51.7% of homes were heated by natural gas. A random…

A: Given X=115 n=221

Q: According to a recent Pew Research Center report, many American adults have made money by selling…

A: Given Data: x=914 n=4579   p^=xn=9144579=0.1996

Q: At a certain college, it is estimated that at most 35% of the students ride bicycles to class. At…

A: given p =0.35 random sample 90 ride bicycles to class x = 28 p⏞ =2890=0.3111

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

A: Given information- Population proportion, p = 11% = 0.11 Sample size, n = 290 c) We have to test the…

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 52% of the…

A: Givensample size(n)=100p^=0.47

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: The Mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor's…

A:

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Margin of Error ME= 0.06 Confidence level c= 0.90

Q: A newsletter publisher believes that less than 68% of their readers own a Rolls Royce. For marketing…

A: The advertiser is decided to reject the null hypothesis that means accept the alternative…

Q: According to the Washington Post, 45% of all Americans are born with brown eyes. Consider a random…

A: State the hypotheses. That is, the proportion of brown- eyed adults in New York do not differs from…

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: Results from the National Health and Nutrition Examination Survey (NHANES) conducted thirty years…

A: Denote p1, p2 as the true population proportions of adults, who considered to be obese thirty years…

Q: It has been claimed that over 30 percent of entering college students have blood cholesterol levels…

A: First, we obtain 20 random numbers between 1 and 57 using the function "RANDBETWEEN()" function in…

Q: The local sheriff has staked his campaign for re-election on the claim that that at least 88% of the…

A: Givensample size(n)=66p^=80%=0.80p=88%=0.88

Q: The IRS is interested in estimating the total number of tax accounts who has their own tax returns…

A:

Q: In a previous​ poll, 37​% of adults with children under the age of 18 reported that their family ate…

A: Denote p as the true proportion of the adults with children under the age of 18 reported that their…

Q: school registrar estimates that the dropout rate of freshmen high schools in Valenzuela is 6. Last…

A: Given that  Sample size n =500 Favorable cases x =90 Sample proportion p^=x/n  =90/500 =0.18

Q: According to a study conducted five years ago by the Organisation for Economic Cooperation and…

A: Given : μ = 4.9 x¯ = 5.06 σ = 0.72 n = 191 α = 0.005

Q: A humane society claims that less than 69​% of households in a certain country own a pet. In a…

A: Given, α=0.10 A random sample of size n=700 The no. of household who say they own a pet is X=455 The…

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.

Q: A humane society claims that less than 35% of U.S. households own a dog. In a random sample of 400…

A: