A research center claims that 24​% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1000 adults in that​ country, 26​% say that they would travel into space on a commercial flight if they could afford it. At α=0.10​, is there enough evidence to reject the research​ center's claim?

A research center claims that at least 31​% of adults in a certain country think that their taxes will be audited. In a random sample of 800 adults in that country in a recent​ year, 26​% say they are concerned that their taxes will be audited. At α=0.10​, is there enough evidence to reject the​ center's claim? Complete parts​ (a) through​ (e) below.       ​(a) Identify the claim and state H0 and Ha.   Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. ​(Type an integer or a decimal. Do not​ round.)   A. The percentage of adults in the country who think that their taxes will be audited is not enter your response here​%.   B. enter your response here​% of adults in the country think that their taxes will be audited.   C. Less than enter your response here​% of adults in the country think that their taxes will be audited.   D. At least enter your response here​% of adults in the country think…

According to data only 32% of Americans are saving for retirement in a 401(k). A random sample of 340 Americans was recently selected, and it was found that 118 of them made contributions to their 401(k) plans this year. a. Using α = 0.01, conduct a hypothesis test to determine if the percentage of Americans who have made contributions to their 401(k) plans this year is more than 32%. Be sure to clearly state your conclusions. b. Perform the same hypothesis test two more times, using α = 0.05 and α = 0.10, respectively. Have your conclusions changed based on either of these two new tests? c. How would the hypothesis test have been different if all you wanted to determine was that the percentage of Americans who have made contributions to their 401(k) plans this year is different from 32%? Perform this test at the α = 0.05 significance level and state your conclusions.

A medical researcher says that less than 85​% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 300 adults in that​ country, 83​% think that healthy children should be required to be vaccinated. At α=0.01​, is there enough evidence to support the​ researcher's claim? Complete parts​ (a) through​ (e) below.       ​(a) Identify the claim and state H0 and Ha.   Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. ​(Type an integer or a decimal. Do not​ round.)   A. Less than 8585​% of adults in the country think that healthy children should be required to be vaccinated. Your answer is correct.   B. The percentage of adults in the country who think that healthy children should be required to be vaccinated is not enter your response here​%.   C. More than enter your response here​% of adults in the country think that healthy children…

4. A city official claims that the proportion of all commuters who are in favor of an expandedpublic transportation system is 50%. A newspaper conducts a survey to determine whetherthis proportion is different from 50%. Out of 225 randomly chosen commuters, the surveyfinds that 90 of them reply yes when asked if they support an expanded public transportationsystem. Test the official’s claim at α = 0.05.

A researcher claims that 89% of people sleep with a pillow.  In a random sample of 1000 people, 825 say that they sleep with a pillow.  At α = 0.10, is there enough evidence to reject the researcher’s claim?

An education researcher claims that at most 5​% of working college students are employed as teachers or teaching assistants. In a random sample of 600 working college​ students, 7​% are employed as teachers or teaching assistants. At α = 0.05, is there enough evidence to reject the researcher's claim? Complete parts​ (a) through​ (e) below. (a) ​Identify the claim and state  H0 and Ha. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. A. The percentage of working college students who are employed as teachers or teaching assistants is not ______​​%. B. More than ______​% of working college students are employed as teachers or teaching assistants. C. At most ______​% of working college students are employed as teachers or teaching assistants. D. ______​% of working college students are employed as teachers or teaching assistants. ​(b) Find the critical​ value(s) and identify the rejection​ region(s).         z0 =…

A research center claims that more than 21% of employees in a certain country have changed jobs in the past four years. In a random sample of 140 people from that country, 35 have changed jobs in the past four years. At α = 0.05, is there enough evidence to support the center's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. At most % of employees in the country have changed jobs in the past four years. % of employees in the country have changed jobs in the past four years. C. The percentage of employees in the country who have changed jobs in the past four years is not D. More than % of employees in the country have changed jobs in the past four years. B. Let p be the population proportion of successes, where a success is an employee in the country who has changed jobs in the…

A humane society claims that less than 69​%of households in a certain country own a pet. In a random sample of 600 households in that​ country, 402 say they own a pet. At α=0.10​, is there enough evidence to support the​ society's claim?

A humane society claims that less than 69​% of households in a certain country own a pet. In a random sample of 700 households in that​ country, 455 say they own a pet. At α=0.10​, is there enough evidence to support the​ society's claim?