As a result of complaints from patients about wait times, the manager at a doctor's office is ready to undertake a study to determine the average wait times. now, the manager has believed the wait time was 7 minutes. What are the null and alternative hypotheses? Но H₁: ▼ C
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- An indigenous plant is used by natives to help those with anxiety. It is believed by natives to immediately reduce anxiety. A study was conducted to test the actual effects of this plant. Participants were given different amounts of the plant extract after being placed in a high anxiety situation. Anxiety scores were then measured. The higher the score, the more anxiety the participants were experiencing. Due to the lack of research surrounding this plant, researchers did not have formal hypotheses. Therefore, compare all 3 groups if the null hypothesis is rejected. Use alpha = .05. Control 1 ounce 2 ounces = 13 SS, = 234 SS, = 206 SS, = 328 = 19 = 17 n, = 30 n, = 30 n, = 30 %3D S Total 1088 A. State the hypotheses. B. Make a decision about the null. C. State your conclusion. D. Relate your conclusion to the research. E. If allowed, conduct analytical comparisons for every comparison. Use alpha = .05Researchers compared the balance of a sample of elderly (E) patients with that of a separate sample of younger (Y ) patients. They exposed members of each age group to unpredictable noises and measured the amount of forward and backward sway. To test whether the elderly tend to sway more, they should choose which pair of hypotheses?A study published in 2005 examined health and dietamong a representative sample of Canadian women.Researchers reported that only 6.8% of women who werevegetarians had high cholesterol, compared to 11.3% ofnon-vegetarians.a) Explain two reasons why this study would not justifya newspaper headline proclaiming, “Want to LowerYour Cholesterol? Become a Vegetarian!” Include analternative explanation for the reported difference.b) If these results were based on data collected from 162vegetarians and 177 non-vegetarians, do they providestatistical evidence that there’s a difference in therates of high cholesterol in the two populations?
- 2. Forty-five percent of the entering CSUN freshmen in Fall 2019 were proficient in math. www.csun.edu/counts/new_first_time_freshman.php a. You want to see if the percentage is different for this fall's entering freshmen. Your hypotheses are Ho: На: where p stands for the percentage of freshmen who were proficient in Fall 2019 / this fall. b. Suppose that the null hypothesis is true that the percentage is 45% for this fall. Here is the sampling distribution of the values of p that would be expected if you repeatedly took random samples of 150 freshman entering this fall and found the proportion proficient in math. From the sketch alone, estimate the mean and the SE 0.33 0.37 0.41 0.45 0.49 0.53 0.57 If the null hypothesis is true, would it be unusual to get 50% in your sample who were proficient in mathematics? Explain: If the null hypothesis is true, would it be unusual to get 45 freshmen in your sample who were proficient in mathematics? Explain: c. You take a random sample of 150…Previously, 11.2% of workers had a travel time to work of more than 60 minutes. An urban economist believes that the percentage has increased since then. She randomly selects 85 workers and finds that 11 of them have a travel time to work that is more than 60 minutes . Test the economist's belief at the a= 0.1 level of significance What are the null and alternative hypotheses? what are the null and alternative hypotheses? Because np0(1-p0)= < ? 10, Find the P-value.Is there a difference between men and women when it comes to seeking preventative healthcare? At the a = 0.01 level of significance, test the claim that the proportion of those who have had a wellness visit with their physician in the past year is the same for men and women. Let pp represent the proportion of females who have had a wellness visit with their physician in the past year and pM represent the proportion of males who have done the same. Which would be correct hypotheses for this test? O Ho:PF = PM, H1:PF > PM O Ho:PF + PM, H1:PF > PM O Ho:PF = pM, H1:pF < pM O Ho:PF = PM, H1:PF # PM In a random sample of 331 females, 306 have had a wellness visit with their physician in the past year. In a random sample of 272 males, 237 have had a wellness visit with their physician in the past year. Find the test statistic (2 decimal places): Give the P-value (4 decimal places - if less than 0.001 answer 0): Which is the correct result: O Reject the Null Hypothesis O Do not Reject the Null…
- A private and a public university are located in the same city. For the private university, 1042 alumni were surveyed and 655 said that they attended at least one class reunion. For the public university, 804 out of 1317 sampled alumni claimed they have attended at least one class reunion. Is the difference in the sample proportions statistically significant? (Use α=0.05) a) Reject the null hypothesis which states there is no difference in the proportion of alumni that attended at least one class reunion in favor of the alternate which states there is a difference in the proportions. b) Fail to reject the null hypothesis. There is not enough evidence to conclude that there is a difference in the proportions. c) There is not enough information to make a conclusion.The mean weight of male aerobics instructors in a certain city is less than 185 lbs. Express the null and alternative hypotheses in symbolic form for this claim.According to the Centers of Disease Control, about 20% of American young people between the ages of 12 and 19 are obese. A student claims that the students his local schools are in better'shape than the national average, so'their proportion of obese students is less than 30%. Which are the appropriate null and alternative hypotheses for this study? Оно: р - 20%, Н р 20% Check Answer Cip
- The manager of an automobile dealership is considering a new bonus plan designed to increase sales volume. Currently, the mean sales volume is 17 automobiles per month. The manager wants to conduct a research study to see whether the new bonus plan increases sales volume. To collect data on the plan, a sample of sales personnel will be allowed to sell under the new bonus plan for a one-month period. (a) Develop the null and alternative hypotheses most appropriate for this situation. H0: ? < 17 Ha: ? ≥ 17 H0: ? = 17 Ha: ? ≠ 17 H0: ? > 17 Ha: ? ≤ 17 H0: ? ≤ 17 Ha: ? > 17 H0: ? ≥ 17 Ha: ? < 17 (b) Comment on the conclusion when H0 cannot be rejected. We can conclude that there is statistical evidence that the new bonus plan increases the mean monthly sales volume.We can conclude that there is not statistical evidence that the new bonus plan increases the mean monthly sales volume. (c) Comment on the conclusion when H0 can be rejected. We can conclude…A recent study indicated men who consume alcohol on a daily basis are at a higher risk of experiencing liver disease. Develop a null hypothesis. Does the scenario indicate a Directional (1-tailed) or Non-Directional (2-tailed) hypothesis? Based on the scenario, develop an alternative hypothesis.Are couples that live together before they get married just as likely to end up divorced within five years of marriage compared to couples that live apart before they get married? 268 of the 674 couples from the study who lived together before they got married were divorced within five years of marriage. 173 of the 405 couples from the study who lived apart before they got married were divorced within five years of marriage. What can be concluded at the = 0.05 level of significance? For this study, we should use Select an answer z-test for a population proportion t-test for a population mean t-test for the difference between two independent population means z-test for the difference between two population proportions t-test for the difference between two dependent population means The null and alternative hypotheses would be: Select an answer μ1 p1 Select an answer ≠ > < = Select an answer p2 μ2 Select an answer μ1 p1 Select an answer < = > ≠ Select…