What is your variable in this study? State your null hypothesis in words, for this study, and finally state your null hypothesis in symbols for this study.
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What is your variable in this study? State your null hypothesis in words, for this study, and finally state your null hypothesis in symbols for this study.
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- You are a research assistant at a zoo. The question of your study is "Has the proportion of baby zebras born in zoos has changed from 10%?". Your supervisor asks that you run a hypothesis test using an significance level of 0.05. Form the study you obtain a z-score of 0.788. Do you reject the null hypothesis and why?You will conduct a post hoc test when ______. a. you suspect one of your sample means is different from other samples b. you suspect two of your sample means are different from each other c. your main effect is significant. d. your main effect is not significantCan you please help me answer the following as I got this incorrect on my assignment: Question: Relate to this specific scenario: What is the null hypothesis? What is the alternate / research hypothesis? Which one do you statistically assess? My answer that was marked incorrect: The null hypothesis states that there is no difference or correlation between a person's heart rate and exam score. The alternative: A person's heart rate and predicted test score are related. An inferential statistical test is performed on the null hypothesis. Professor feedback to change and resubmit: not either of these words is most appropriate - scenario states prediction To measure whether test performance can be predicted based on one’s anxiety, a researcher asked his students to come to the lab 15 minutes before they were to take an exam in his class. The researcher measured the students' heart rates and then matched these scores with their exam performance after they had taken the exam. Use the…
- Suppose a friend of yours was interested in comparing the meanreading scores of four ethnic groups in her classroom but has no idea what statistical procedure to use. So, she comes to you for advice since she knows you recently completed a statistics course. Your friend tells you that each group has 8 students. Given this information: (1) State the null and alternative hypotheses for this study (2) What is the dependent and independent variable for this study (3) What test statistic/hypothesis test would you select to determine if the means are significantly difference at the alpha .05 level?I need help with this questionFloretta, a golfer, claims that her drive distance is not equal to 238 meters, on average. Several of her friends do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She hits 19 drives, collects the proper data, and works through the testing procedure: • Hou = 238; HH #238 • a = 0.05 (significance level) The test statistic is X-Ho Zo == 256-238 14 V19 <= 5.6 • The critical values are -20.025 = -1.96 and 20.025 = 1.96. Conclude whether to reject or not reject Ho. and interpret the results. Select the correct answer below: Reject Ho. At the 5% significance level, the test results are not statistically significant and at best, provide weak evidence against the null hypothesis. Reject Ho. At the 5% significance level, the data provide sufficient evidence to conclude that the mean distance is not equal to 238 meters. Do not reject Ho. At the 5% significance level, the test results are not statistically significant and at best, provide…
- In a study, a large sample representative of the households in the US were asked about their smoking habits. The data suggested that current smokers were on average much healthier than those who recently stopped smoking. Investigators concluded that smoking does not necessarily lead to worse health outcomes. Consider the following statements. Select the ones you agree with, based on the information given. Group of answer choices A.In a randomized experiment, smoker and non-smoker groups are similar across all potential characteristics. b.The conclusions were justified by the data. c.This is an observational study. d.This study is a randomized controlled experiment. e.The results can be explained due to confounding. Current smokers are different from those who recently stopped in ways that are related to health outcomes.You read in the report of a psychology experiment: "Separate analyses for our two groups of 12 participants revealed no overall placebo effect for our student group (mean = 0.08, SD = 0.37, 4 = 0,49)and a significant effect for our nonstudent group (mean = 0.35, SD = 0.37, ¢u = 3.25, p < 0.01). 'IS The null hypothesis is that the mean effect is zero. What are the correct values of the two t statistics based on the means and standard deviations? Compare each correct talue with the critical values in Table C. What can you say about the twosided Pvalue in each case?mis 2 A newspaper published an article about a study in which researchers subjected laboratory gloves to stress. Among 237 vinyl gloves, 59% leaked viruses. Among 237 latex gloves, 9% leaked viruses. Using the accompanying display of the technology results, and using a 0.05 significance level, test the claim that vinyl gloves have a greater virus leak rate than latex gloves. Let vinyl gloves be population 1. Click the icon to view the technology results. What are the null and alternative hypotheses? W S OA. Ho: P1 P2 H₁: P₁ P2 View an example ** OD. Ho: P1 P2 H₁: P₁ P2 Identify the test statistic. hand x H (Round to two decimal places as needed.) # 3 20 F3 E D C Get more help - ▲ $ 4 888 F4 R F % 5 V T F5 G B. Ho: P1 P2 H₁: P1 P2 OE. Ho: P1 = P2 H₁: P₁ P2 B F6 MacBook Air Y H & 7 Technology Results Pooled proportion: 0.34 Test statistic, z: 11.4616 Critical z: 1.6449 P-value: 0.0000 www 90% Confidence interval: 0.4371413frisi wants to check the support of political parties in the Reykjavík area and decided to stand at the entrance of Kringlan one weekend and ask people what they are going to vote for. It was Kringlukast and a lot of good offers so many made their way there this weekend. Iris received a total of 834 answers to the question, what are you going to vote for in the upcoming election? "What is the main statistical problem with Iris' survey? 1. It is not corrected for placebo effect. 2. There is a risk of research bias in the survey. 3. There is a risk of sampling in the survey. 4. The number of participants is small and therefore the hypothesis tests that will be performed will have little strength. Assume that the time it takes to run the New Year's race follows a normal distribution with an average of 50 minutes and a standard deviation of 10 minutes. Questions 10 and 11 deal with the New Year's race. Question 10 Lalla sadly, runners who do not finish the race in less than 60 minutes feel…A sociologist claims that the students’ college GPA’s in unrelated to their families’ incomes. For a random sample of 20 students the coefficient of correlation was computed as 0.40. Using the 0.01 significance level, do the formal hypothesis test.Remember to show your steps (including all relevant information) show the steps on how to solve itHOw would you figure this out?SEE MORE QUESTIONS