A simple random sample of 1088 adults is conducted. It is found that 261 of the...
A simple random sample of 1088 adults is conducted. It is found that 261 of the 1088 adults smoke. Use a .05 significance level to test the claim that the proportion of adult smokers is at least 20%. (a) Find the null and alternative hypothesis. (b) determine if the test is a right-tail test, left-tail test, or a two-tail test. (c) Find the test statistics. (d) find the p-value. (e) do you reject the null hypothesis or fail to reject the null hypothesis.
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A simple random sample of 1088 adults is conducted. It is found
that 261 of the...
In a random sample of 1276 U.S. adults, 903 favor using mandatory testing to assess how...
In a random sample of 1276 U.S. adults, 903 favor using mandatory testing to assess how well schools are educating students. In another random sample of 1112 U.S. adults taken 9 years ago, 799 favored using mandatory testing to assess how well schools are educating students. At α = 0.05, can you support the claim that the proportion of U.S. adults who favor mandatory testing to assess how well schools are educating students is less than it was 9 years...
A hypothesis test is conducted to test the null hypothesis that the mean is less than...
A hypothesis test is conducted to test the null hypothesis that the mean is less than 12. Use a 0.01 level of significance. What type of test is this? Right tail Two tail Left tail What is the critical value? 2.33 -2.33 1.78 correct answer is not given Suppose the test statistic was -2.50 What is the conclusion? Fail to reject Ho. There is not sufficent evidence to support the claim that the mean is less than 12. Reject Ho....
In a random sample of 125 adults, 64% say they have used a cellular phone to...
In a random sample of 125 adults, 64% say they have used a cellular phone to access the Internet. We want to test a researcher’s claim at the 5% significance level that more than 60% of U.S. adults have used a cellular phone to access the Internet. [2 points] Find the null and alternate hypotheses. [6 points] By hand, showing work, find the test statistic. [4 points] Sketch the sampling distribution labeling the test statistic and the P-value. [2 points]...
A state-by-state survey found that the pro tions of adults who are smokers i state A...
A state-by-state survey found that the pro tions of adults who are smokers i state A and state were 21.0% and 25 2% especie y Suppose the number ofrespondents om each gate was 3000 At α=0.05, can you su port the e aim that the proportion of adults wh are smokers greater in state A than in staa B? Assumǚ the random sample; ara indapan dant. Com late parts (a) through (e). (a) Identify the daim and state HandH The...
6.16 Is college worth it? Part I: Among a simple random sample of 331 American adults...
6.16 Is college worth it? Part I: Among a simple random sample of 331 American adults who do not have a four-year college degree and are not currently enrolled in school, 48% said they decided not to go to college because they could not afford school. (a) A newspaper article states that only a minority of the Americans who decide not to go to college do so because they cannot afford it and uses the point estimate from this survey...
NCAA Football Coach Salaries: A simple random sample of 40 salaries of NCAA football coaches in...
NCAA Football Coach Salaries: A simple random sample of 40 salaries of NCAA football coaches in NCAA has a mean of $459,953 and standard deviation of $39,000. Use a 0.05 significance level to test the claim that the mean salary of a football coach in NCAA is less than $480,000. What is the null hypothesis? What is the alternative hypothesis? What is the p-value and the test statistic? Do we reject the null or fail to reject the null? Write...
Among a simple random sample of 331 American adults who do not have a four-year college...
Among a simple random sample of 331 American adults who do not have a four-year college degree and are not currently enrolled in school, 48% said they decided not to go to college because they could not afford school. (a) A newspaper article states that only a minority of the Americans who decide not to go to college do so because they cannot afford it and uses the point estimate from this survey as evidence. Conduct a hypothesis test to...
1. In a survey conducted in August, 2017, a random sample of 2,752 U.S. adults were...
1. In a survey conducted in August, 2017, a random sample of 2,752 U.S. adults were asked whether they had visited a public library in the previous 12 months. The results of this survey are shown in the two-way table below, stratified by gender. Conduct a hypothesis test on this data, using a 10% significance level, to test the claim that the true proportion of U.S. adult males who visited a public library in the previous 12 months differs from...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducte...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
(a) Write the calm mathematically and identify Ho and H, (b) Find the critical value(s) and...
(a) Write the calm mathematically and identify Ho and H, (b) Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic (d) Decide whether to reject or fail to reject the null hypothesis. A medical researcher says that at least 29% of adults are smokers. In a random sample of 200 adults, 22.5% say they are smokers. At 001, do you have enough evidence to reject the researcher's claim? (a) Which of the following correctly...
A state-by-state survey found that the pro tions of adults who are smokers i state A and state were 21.0% and 25 2% especie y Suppose the number ofrespondents om each gate was 3000 At α=0.05, can you su port the e aim that the proportion of adults wh are smokers greater in state A than in staa B? Assumǚ the random sample; ara indapan dant. Com late parts (a) through (e). (a) Identify the daim and state HandH The...
1. In a survey conducted in August, 2017, a random sample of 2,752 U.S. adults were asked whether they had visited a public library in the previous 12 months. The results of this survey are shown in the two-way table below, stratified by gender. Conduct a hypothesis test on this data, using a 10% significance level, to test the claim that the true proportion of U.S. adult males who visited a public library in the previous 12 months differs from...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
(a) Write the calm mathematically and identify Ho and H, (b) Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic (d) Decide whether to reject or fail to reject the null hypothesis. A medical researcher says that at least 29% of adults are smokers. In a random sample of 200 adults, 22.5% say they are smokers. At 001, do you have enough evidence to reject the researcher's claim? (a) Which of the following correctly...
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