the percentage of adults who approve of labor unions has decreased since​ 1936? What are the hypotheses for the one-proportion z-test?

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: It is given that the population proportion is 0.55  The favorable case x=1723 and the sample size…

Q: A test of the breaking strength of two different types of cables was conducted using samples of n, =…

A: Given that

Q: Recently, a large academic medical center determined that 9 of 18 employees in a particular position…

A: Given : Recently survey conduct : Where conclude that 9 of 18 employees in a particular position…

Q: A sample of 100 yielded a test statistic of 2.1. For a level of significance of 0.05, the null…

A:

Q: It was reported that 46% of people believe that there is life on other planets in the universe. A…

A: One Proportion Z - test is applicable in this case

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

A:

Q: It has been claimed that 71% of all adults use their cell phones within an hour of going to bed.…

A: From the provided information, The claim is that 71% of all adults use their cell phones within an…

Q: 17% of all college students volunteer their time. Is the percentage of college students who are…

A: 17% of all college students volunteer their time. Is the percentage of college students who are…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 30%. Given the…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: in recent poll of 900 randomly selected high school athletes, 86% said they regularly workout on the…

A:

Q: 17% of all college students volunteer their time. Is the percentage of college students who are…

A:

Q: From the sample statistics: x1=41, n1=100; x2=35, n2=140. Find the appropriate p-value used to test…

A: Given  x1=41, n1=100; x2=35, n2=140. We want to test the hypothesis

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: The hypothesized proportion is 0.55.

Q: A computer manufacturer believes that the proportion of hardware malfunctions is different in humid…

A: Given, The manufacturer takes a random sample of 400 machines sold in Florida (humid) and 400…

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: Solution: 8. Let X be number people are in favor of stricter gun control and n be the sample number…

Q: The z-statistic for the difference between the tvlo sample proportions is 5.266 with a P- value of…

A: Given, Z-statistics = 5.266 p-value = 0.00000014 α=0.05

Q: The following table shows results from a General Social Survey on belief in the afterlife,…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Only 20% of registered voters voted in the last election. Will voter participation decline for the…

A: The provided information are:

Q: English Air continually monitors the proportion of overweight items checked by passengers on its…

A: The provided information is a. n1=226,  n2=300x1=30,  x2=54α=0.01The null and alternative hypothesis…

Q: A newsletter publisher believes that less than 32% of their readers own a laptop. For marketing…

A: Decision : Reject the null hypothesis.

Q: A survey claims that 9 out of 10 doctors recommend brand W for their patients who have children. To…

A:

Q: A statistical test of hypothesis produces the P-value P = 0.112.  Will the null hypothesis be…

A: Decision rule : Reject H0 if P-value  <  α

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: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

Q: Is it commonly believed that the mean body temperature of a healthy adult is 98.6f you are not…

A: Solution: From the given information, the claim is that the mean body temperature of a healthy adult…

Q: An article claimed that "those with a college degree reported a higher incidence of sunburn than…

A:

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 recent report indicated that families in a certain country typically spend about $175 per week on…

A:

Q: In a clinical trial, 227 subjects were treated with a pain medicine and 52 of them developed nausea.…

A: Givensample size(n)=227x=52p^=xn=52227=0.2291α=0.05

Q: A poll found that in a random sample of 1000 American adults, 710 indicated that they oppose the…

A:

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: Given : Claim : The proportion of those favoring stricter gun control has changed from 0.55.

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: Given problem is :

Q: In 1990, 58% of Americans 18 years old and older reported they have a great deal of concern…

A: Introduction: Here, the hypothesized proportion is given as 58% or p = 0.58. The researchers collect…

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: The given claim is that the proportion of those favoring stricter gun control has changed from 0.55.…

Q: A published report claims that 35% of college students have used an online dating site or app.…

A:

Q: The advertised claim for batteries for cell phones is set at 48 operating hours, with proper…

A: Given that  n=5000 , X=15 , p=0.2%=0.002

Q: A researcher claims that the incidence of a certain type of cancer is less than 5%. To test this…

A: We are given,Researcher claim: the incidence of a certain type of cancer is less than 5%Sample size…

Q: 20% of all college students volunteer their time. Is the percentage of college students who are…

A: It is given that the number of students who volunteered their time (x) is 61 and the sample of…

Q: Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A…

A: We want to test the hypothesis

Q: On a normal weekend, 14% of those attending Mass at a local Catholic church donate over $200 per…

A: Given : P(donate over $200) = 0.14 P(donate Between $100 and $200) = 0.26 P(donate less than $100) =…

Q: A significance test is conducted for which the alternative hypothesis states that more than 83…

A: As per the question we have Claim :- More than 83 percent of all adult sea turtles on a certain…

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

A:

Q: A behavioral scientist investigated whether there is a significant difference in the percentages of…

A: The two-sample z-test for proportions is used to test the difference between two  population…

Q: A presidental candidate's aide estimates that, among all college students the propotion p who intend…

A:

Q: 5) Historically, the percentage of U.S. residents who support stricter gun control laws has been…

A:

Q: Does stretching before exercise reduce the chance of injury? To answer this question, a random…

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: 6)A poll surveyed 341 video gamers, and 81 of them said that they prefer playing games on a console,…

A: From given data we have ; n=341 Sample x=81  Population  proportion p= 26% =0.26 Sample Proportion…

Q: A survey claims that 9 out of 10 doctors recommend brand Wfor their patients who have children. To…

A: Type of test : If alternative hypothesis contain 'not equal to ( \= ) sign then it is two tailed…

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.