1. A researcher claims that the United Nationalist Alliance (UNA) will win the election. A total of 4300 voters were polled and 2200 said they would vote for UNA. Is there enough evidence at 0.05 level of significance to support the claim? neieiosa Ho: На: :noizulono)
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- 49% of workers got their job through internet resume sites. A researcher thinks it has increased. a) Express the null and alternative hypotheses in symbolic form for this claim. When entering the decimal enter the zero before the decimal point. For example, if you have 35%, enter it as 0.35. Ho: Ha: Use the following codes to enter the following symbols: enter >= enter <= enter != b) You decide to survey 100 adult Americans and find that 12 of workers got their job through internet resume sites. Find the test statistic. Round to two decimal places. 2 = c) What is the p-value? Round to 4 decimals. p = d) Make a decision base on a 0.05 significance level. Reject the null Do not reject the null e) What is the conclusion? There is sufficient evidence to support the claim that 49 % of workers got their job through internet resume sites has increased O There is not sufficient evidence to support the claim that 49 % of workers got their job through internet resume sites has increasedA sample of 830 Americans was randomly selected on the population of all American adults. Among other questions, the sample was asked if they believe that the United States will land a human on Mars by 2050. Of those sampled, 544 stated that they believe this will happen. a) Calculate the sample proportion of Americans who believe the US will land a human on Mars by 2050. Round this value to four decimal places. b) Write one sentence each to check the three conditions of the Central Limit Theorem. Show your work for the mathematical check needed to show a large sample size was taken. c) Using the sample proportion obtained in (a), construct a 90% confidence interval to estimate the population proportion of Americans who believe the US will land a human on Mars by 2050. Please do this “by hand” using the formula and showing your work (please type your work, no images accepted here). Round your confidence limits to four decimal places.A recent survey by a local radio station shows that 3 of 8 listeners like a new song while 1/4 hate it. The rest have no strong opinion. a) If 1600 people answered the survey, how many people like the new song? b) If 1600 people answered the survey, how many people dislike the new song?
- 49% of workers got their job through internet resume sites. A researcher thinks it has increased. a) Express the null and alternative hypotheses in symbolic form for this claim. When entering the decimal enter the zero before the decimal point. For example, if you have 35%, enter it as 0.35. Ho: Ha: Use the following codes to enter the following symbols: enter >= enter <= + enter != b) You decide to survey 100 adult Americans and find that 12 of workers got their job through internet resume sites. Find the test statistic. Round to two decimal places. -7.40 c) What is the p-value? Round to 4 decimals. d) Make a decision base on a 0.05 significance level. O Reject the null Do not reject the null e) What is the conclusion? There is sufficient evidence to support the claim that 49 % of workers got their job through internet resume sites has increased O There is not sufficient evidence to support the claim that 49 % of workers got their job through internet resume sites has increased AIVI42) A marketing company selected a sample of 25 lawyers and 25 doctors to determine if they had voted in the last election. At a 0.05, test the claim that the proportions who voted are equal. 42) Lawyers Doctors Voted 17 12 13 Did not vote 8 25 25 Total A) There is not evidence to reject the claim that the proportions are equal because the test value 2.053 0.821 D) There is evidence to reject the claim that the proportions are equal because the test value 3.841 > 0.821More than 35% of people support legalizing gay marriage. Express the null and alternative hypotheses in symbolic form for this claim (enter as a percentage). Ho:P H:P Use the following codes to enter the following symbols: > enter >= < enter <= + enter != Question Help: Message instructor D Post to forum Submit Question Jump to Answer
- 2) A baseball pitcher threw 3848 pitches during part of a recent season. Of these, 1372 were thrown with no strikes on the batter, 961 were thrown with one strike, and 1515 were thrown with two strikes. Find the following: a) P(A baseball pitch is thrown with no strikes) = b) P(A baseball pitch thrown with fewer than two strikes)=. 3) In a survey 46,281 women were asked how many children they had. The results were as follows. Number of children 3 4 5 8 or more Number of women 12,574 7,493 11.282 7,124 3,778 1,811 924 523 772 a) P(sampled woman has exactly 4 children)? b) P(Sampled woman has more than 3 children)? c) Assume this is a simple random sample of U.S. women. Use the Empirical Method to estimate the probability that a woman has more than seven children. d) Using a cutoff of 0.05, is it unusual for a woman in the survey to have no children? (Hint: Find the probability the woman has no children.)25.) 90% of all dogs have city licenses. If 7020 licenses have been issued, how many dogs are there in the city? 25.)84% of workers got their job through networking. A researcher thinks it has increased. a) Express the null and alternative hypotheses in symbolic form for this claim. When entering the decimal enter the zero before the decimal point. For example, if you have 35%, enter it as 0.35. Ho: Ha: Use the following codes to enter the following symbols: enter >= < enter <= + enter != b) You decide to survey 100 adult Americans and find that 44 of workers got their job through networking. Find the test statistic. Round to two decimal places. c) What is the p-value? Round to 4 decimals. d) Make a decision base on a 0.05 significance level. O Do not reject the null O Reject the null e) What is the conclusion? O There is sufficient evidence to support the claim that 84 % of workers got their job through networking has increased O There is not sufficient evidence to support the claim that 84 % of workers got their job through networking has increased
- 8) 200 students are asked to fill out a survey. When the information was compiled, it was observed that 97 students indicated that they live with their Biological Father and 145 students indicated that they live with their Biological Mother if 23 students were adopted. How many students live in a home with both biological parents?11) For a survey, individuals were asked if people with "extreme views" should be allowed to give speeches at public events or not. We want to see if there is a difference between male and female respondents. Among 573 males, 459 said "allow". Among 719 females, 552 said “allow". a) If PM and Pf are taken to be the proportions of all males and all females respectively who would choose to allow people with extreme views to speak at public events, state the null and alternative hypotheses to be tested. b) Calculate the sample proportions of males and females who would "allow" these speakers. c) Calculate the pooled sample proportion of respondents who would allow these speakers. d) Perform a z test to compare the proportions of males and females who would allow the speakers. What is the P- value? Discuss its significance in the context of this problem.2.24 Students at a private liberal arts college are clas- sified as being freshmen, sophomores, juniors, or se- niors, and also according to whether they are male or female. Find the total number of possible classifica- tions for the students of that college.