the percentage of adults who approve of labor unions has decreased since 1936? What are the hypotheses for the one-proportion z-test?
Q: John is interested in whether there is a relationship between gender and attitudes towards flogging…
A: Given The data is as follows: Flogging Gender Yes No Not sure Men 15 5 3 Women 20 10…
Q: What is stated by the alternative hypothesis (H1) for an ANOVA? Explain. a. There are no…
A: ANOVA in statistics is the technique which is used to compare the population means when the number…
Q: Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…
A: As per our guidelines we are supposed to answer only 3 sub-parts of any questions so i am solving…
Q: A researcher is studying the effects of the college experience on attitudes, values, and behaviors…
A: given information: FRESHMAN SENIORS mean1=2.07 mean2=2.17s1=1.23…
Q: Which is true about a Z-score? a.It identifies the confidence interval for a group of data. b.It…
A: A z-score describes the position of a raw score in terms of its distance from the mean, when…
Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…
A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The…
Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…
A: a. Denote p1, p2 as the true population proportions of wildfires caused by human in south and west,…
Q: The owner of Maumee Motors wants to study the relationship between the age of a car and its selling…
A: Given that
Q: 1970, 570 students among 1000 randomly selected college freshmen thought that capital punishment…
A: Given that Sample size n1=1000 , n2=1000 Favorable cases x1=570 , x2=480
Q: A researcher wants to investigate whether mood is related to chocolate consumption. She recruits a…
A: Claim : The mood is related to chocolate consumption we have to use Chi-square test of independence…
Q: In 1970, 570 students among 1000 randomly selected college freshmen thought that capital punishment…
A: It is given that For 1970: X1 = 570, n1 = 1000 For 2005: X2 = 480, n2 = 1000
Q: A large no. of households is divided in separate groups according to their attributes. Test the null…
A: The chi-square test is used to test the association between the row and column variables in a two…
Q: A hypothesis test is to be conducted using a .05 significance level. The null hypothesis is that the…
A:
Q: In 1970, 590 students among 1000 randomly selected college freshmen thought that capital punishment…
A: According to the given information in this question We need to find the value of two sample z test…
Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…
A:
Q: Perform the following hypothesis test of a proportion: HO: p = 0.33 HA: p 0.33 The sample…
A: We have given that, HO: p = 0.33 vs HA: p ≠ 0.33 and sample size (n) = 100 Sample proportion (p̂)…
Q: A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the…
A: State the Null and alternate hypotheses: The two categories of interest are the “Amount of smoking”…
Q: 2. 10% of all college students volunteer their time. Is the percentage of college students who are…
A: As per our guidelines, we can solve only the first three subparts, Kindly repost the others for…
Q: study was conducted of 531 persons injured in bicycle crashes. The subjects were asked if they wore…
A: Given that We have to determine if there was a relationship between helmet wearing and the…
Q: In 2002, the General Social Survey (which uses a method similar to simple random sampling) asked,…
A: Suppose, p is the proportion of all Americans who have experienced back pain in the past 12 months.
Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…
A: n1=590,x1=386,n2=538,x2=363
Q: Social networking is becoming more and more popular around the world. Pew Research Center used a…
A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of adults using social networking…
Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…
A: Let us consider the two samples which are independent. Let the observation in each samples are taken…
Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…
A:
Q: association between marital status (married, divorced, separated) and BMI (quantitative). Which of…
A: Here we have given the multiple choice question about testing if there is an association between…
Q: school administrator claims that 85% of the students at his large school plan to attend college…
A: Given that ; Sample size (n) = 50 P = 85 % P(cap) = 76% By using one sample proportion test we get
Q: how many of the 200 tests, using a significance level of 5%, will incorrectly find significance
A: Here given We are conducting many hypothesis tests to test a claim. Assuming the null hypothesis is…
Q: Are Republicans less likely than Democrats to display the American flag in front of their residence…
A: Consider that p1, p2 is the true proportions of Republicans and Democrats, who display the American…
Q: unions. At the 10% significance level, do the data provide sufficient evidence to conclude that the…
A:
Q: Very large random samples of Catholics, Protestants, and people with no religious affiliation have…
A: Introduction: Statistical significance and practical significance are not one and the same thing.…
Q: The table below summarizes the results of a survey in which randomly selected people were asked how…
A: The variables are feelings on medical Marijuana and gender.
Q: Perform the following hypothesis test of a proportion: HO: p = 0.125 HA: p 0.125 The sample…
A:
Q: A radio news story claimed that half of all U.S. adults have Internet access. In a national poll…
A:
Q: Are job applicants with easy to pronounce last names just as likely to get called for an interview…
A: Given Information: Easy to pronounce last names: Sample size n1=530 Number of successes x1=413…
Q: c. The p-value = d. The p-value is e. Based on this, we should Select an answer f. Thus, the final…
A: From Part (b), the z test statistic is 2.234.
Q: A marketing agency wanted to determine if a new commercial changed people's opinion about a company.…
A: Statistical hypothesis means the decision about a population parameter. Here we look at the data we…
Q: We are interested in determining whether or not there has been a significant change in the…
A:
Q: 1. Below are the number of hours spent by teachers and students in using gadgets daily. A sample of…
A: given data
Q: In studying the responses to questions on a multiple-choice test, the following sample data are…
A: Given ,The responses to the questions occur with the same frequency . The responses to…
Q: If the level of significance in a hypothesis test is 1 %, what would the p-value have to be for…
A: We fail to reject the null hypothesis when the p value is greater than the significance level. We…
Q: A consumer magazine wants to compare the lifetimes of ballpoint pens of three different brands…
A: Enter the given data in EXCEL sheet as shown below:
Q: arires Is the proportion of wildfires caused by humans in the south different from the proportion or…
A: Note: Since you have posted a question with multiple subparts, we will solve the first three…
Q: Perform the following hypothesis test of a proportion: HO: p = 0.125 HA: p 0.125 The sample…
A: We have given that, Population proportion (p) = 0.125, sample proportion (p̂) = 0.1, sample size…
Q: The national percentage of automobile accident fatalities that are alcohol related is 39%. In a…
A:
Q: According to a report on consumer fraud and identity theft, 24% of all complaints for a year were…
A: The hypothesized proportion is 0.24.
In a recent poll 1011, randomly selected adults were asked whether they approve of labor unions;57% said yes. In 1936, about62%of adults approved of labor unions. At the 1% significance level, do the data provide sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936?
Given :
Claim : The percentage of adults who approve of labor unions has decreased since 1936.
Step by step
Solved in 4 steps with 1 images
- Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 348 of the 574 randomly selected wildfires looked at in the south were caused by humans while 272 of the 518 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer Select an answer Select an answer (please enter a decimal) H₁: Select an answer Select an answer Select an answer (Please enter a decimal) = c. The test statistic ? ◊ your answer to 3 decimal places.) (please showIf sample data is such that for a one-tailed test of ? you can reject H0 at the 1% level of significance, can you always reject H0 for a two-tailed test at the same level of significance? Explain your answer? A. Yes. If H0 for a one-tailed test is rejected at the 1% level of significance, it will always be rejected for a two-tailed test at the same level of significance. B. No. If H0 for a one-tailed test is rejected at the 1% level of significance, it will never be rejected for a two-tailed test at the same level of significance. C. Yes. The P-value for the two-tailed test could be greater than 0.01. D. No. The P-value for the two-tailed test could be greater than 0.01.In 1970, 590 students among 1000 randomly selected college freshmen thought that capital punishment should be abolished. In 2005, 350 students among 1000 randomly selected college freshmen thought that capital punishment should be abolished. What is the two-sample z test statistic for evaluating the null hypothesis that the percentage of students who support capital punishment did not change from 1970 to 2005? Round your answer to two decimal places.
- If a hypothesis test were conducted using a 5% level of significance, for which of the following p-values would the null hypothesis be rejected? A. 0.0367 B. 0.0501 C. 0.100 D. 0.299A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.A study of the career plans of young women and men sent questionnaires to 722 students of class at one University. One question asked which major within the business program the student had chosen. With data we test a statement: Does the data suggest that there is a relationship between the gender of students and their choice of major? We calculated the p-value and it is 0,0127 and the level of significance is 0,05. The conclusion to the test is: a. there is sufficient evidence to conclude that the choice of major and the gender of the student are not independent of each other. b. there is insufficient evidence to conclude that more females prefer administration than males c. there is insufficient evidence to conclude that the choice of major and the gender of the student are not independent of each other. d. there is sufficient evidence to conclude that students find economics very hard. Zrušit mou volbu
- What statistical analysis could be used to determine whether the unsuccessful dieters attained a significantly different percentage from their weight-loss goal, on average, than did the successful dieters? single-sample t test In which of the following four categories does this situation fall? a. only scale variables b. nominal independent variables, scale dependent variable c. only nominal variables d. any ordinal variables (that cannot be treated as nominal)According to a report on consumer fraud and identity theft, 20% of all complaints for a year were for identity theft. In that year, California had 724 complaints of identity theft out of 3466 consumer complaints. Does this data provide enough evidence to show that California had a higher proportion of identity theft than 20%? Test at the 5% level. State the hypotheses. Ho: P ? ✓ Ha: P?V Calculate the test statistic. Round to four decimal places. Ô = Calculate the standardized test statistic. Round to three decimal places. Z= Find the p-value. Round to four decimal places. p-value = State your decision. O Since the p-value is less than .05, reject Ho. O Since the p-value is less than .05, fail to reject Ho. Since the p-value is greater than .05, fail to reject Ho. Since the p-value is greater than .05, reject Ho. Interpret the results. O At the 5% level of significance, there is not enough evidence to show that the proportion of complaints due to identity theft in California is not…According to a report on consumer fraud and identity theft, 20% of all complaints for a year were for identity theft. In that year, Rhode Island had 717 complaints of identity theft out of 3498 consumer complaints. Does this data provide enough evidence to show that Rhode Island had a higher proportion of identity theft than 20%? Test at the 5% level. State the hypotheses. Họ: p ? Ha: P Calculate the test statistic. Round to four decimal places. Calculate the standardized test statistic. Round to three decimal places. z = Find the p-value. Round to four decimal places. p-value = State your decision. O Since the p-value is less than .05, reject Ho. O Since the p-value is greater than .05, fail to reject Hg. O Since the p-value is less than .05, fail to reject Hg. O Since the p-value is greater than .05, reject Ho. Interpret the results. O At the 5% level of significance, there is enough evidence to show that the proportion of complaints due to identity theft in Rhode Island is more than…
- Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 356 of the 579 randomly selected wildfires looked at in the south were caused by humans while 322 of the 597 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Hn: Select an answer v Select an answer v Select an answer v (please enter a decimal) Hj: Select an answer v Select an answer v Select an answer v (Please enter a decimal) c. The test statistic ? v= (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? v a f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The results are statistically significant at a = 0.01, so there is sufficient…Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 429 of the 567 randomly selected wildfires looked at in the south were caused by humans while 396 of the 544 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer Select an answer v Select an answer | (please enter a decimal) Hj: Select an answer v Select an answer v Select an answer v (Please enter a decimal) c. The test statistic ? (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? v a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) the null hypothesis. O The results are statistically insignificant at a = 0.05, so there is statistically…