antidepressant drug or a placebo for six weeks. Of the 324 patients who received the antidepressant drug, 27 were not smoking one year later. Of the 476 patients who received the placebo, 56 were not smoking one year later. Given the null hypothesis Ho (Pdrug - Pplacebo) = 0 and the alternative hypothesis Ha (Pdrug - Pplacebo) #0, conduct a test to see if taking an antidepressant drug can help smokers stop smoking. Use a = 0.01, (a) The test statistic is (b) The P-value is #
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- What is an experiment?As a result of dog breeding for certain physical traits, many dog breeds have changed in the last 100 years. A dog breeder wants to measure the effects of breeding on the face length of the boxer breed using a hypothesis test. Suppose that the dog breeder has face length measurements (in inches) from a random sample of 40 female boxer dogs taken in 1915 and a random sample of 40 female boxer dogs taken in 2015. Which type of hypothesis test should the breeder use? Reference: Elegans, C. 100 Years of Breed Improvement. 2012. Dog Behavior Science. Retrieved from: https://dogbehaviorscience.wordpress.com/2012/09/29/100-years-of-breed-improvement Test for one population proportion Test for one population mean Test for a difference in two population proportions Test for a difference in two population meansAmong 1820 subjects in a study, 30 suffered from tuberculosis and 1790 did not. Chest x- rays were given to all individuals and 73 had a positive x-ray while 1747 were negative. Develop a null and alternative hypothesis for disagreement between the x-ray and the culture. Based on the data should you reject the null hypothesis at a 0.05 level?
- A researcher goes to a local park to see how many people are wearing face masks. She counts 37 women in the park, of whom 24 are wearing face masks, while 14 out of 30 men are wearing face masks. Can she say that there is a significant difference of the percent of each gender who wears masks? (Use α = .10) Hypothesis testing will consist of four hypothesis tests which you need to complete. each test will require the following: Type of Test: Null Hypothesis: Alternate Hypothesis: Standard Error: Test Statistic: P-value: Decision: Sentence: Please graph the answer on a graph (Solve p =, z =, etc)Is there an association between whether adults eat breakfast and whether they own a pet? To investigate, researchers select a random sample of 75 adults and asked them if they ate breakfast and if they owned a pet. The researchers would like to determine if there is convincing evidence of an association. Let a = 0.05. What are the hypotheses for this test? O Họ: There is an association between whether adults eat breakfast and whether they own a pet. Hạ: There is no association between whether adults eat breakfast and whether they own a pet. O Ho: There is no association between whether adults eat breakfast and whether they own a pet. Hạ: There is an association between whether adults eat breakfast and whether they own a pet. O Họ: There is no difference in the distribution of whether adults eat breakfast and whether they own a pet. Hạ: There is a difference in the distribution of whether adults eat breakfast and whether they own a pet. O Ho: There is a difference in the distribution of…A hypothesis was done using Ho: p=15% HA: p>15% The hypothesis test where p= the percentage of Americans who regularly listen to music that have hearing loss. The hypothesis test used alpha= .01 and the p-value of the test was .0007. The correct conclusion for this test is
- Are freshmen psychology majors just as likely to change their major before they graduate compared to freshmen business majors? 361 of the 687 freshmen psychology majors from a recent study changed their major before they graduated and 435 of the 737 freshmen business majors changed their major before they graduated. What can be concluded at the & = 0.10 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Hn: Select an answer v Select an answer v Select an answer v (please enter a decimal) H: Select an answer v Select an answer Select an answer v (Please enter a decimal) b. The test statistic ? v = (please show your answer to 3 decimal places.) c. The p-value = (Please show your answer to 4 decimal places.) d. The p-value is ? v a e. Based on this, we should Select an answer v the null hypothesis. f. Thus, the final conclusion is that ... O The results are statistically insignificant at a = 0.10, so there is insufficient…The Department of Motor Safety is conducting a study to determine how many hours each weekcar and truck drivers drive. In order to assess this, they equipped special trackers in 50 cars andtrucks. They received the following information: Truck Drivers Car DriversX̄ = 19.5s = 4.75n = 50 X̄ = 17s = 3.5n = 501. What is the null and research hypothesis for this study?A teacher selects a random sample of 56 students from her large high school. For each student, she records the length of their hair and whether they play a sport. She would like to know if there is convincing evidence that hair length is associated with playing a sport. Let = 0.05. What are the hypotheses for this test? H0: Hair length is not independent of playing a sport.Ha: Hair length is independent of playing a sport. H0: Hair length is independent of playing a sport.Ha: Hair length is not independent of playing a sport. H0: There is an association between hair length and playing a sport.Ha: There is no association between hair length and playing a sport. H0: The proportion of students with differing hair lengths is not the same if they play sports.Ha: The proportion of students with differing hair lengths is the same if they play sport
- The recidivism rate for convicted sex offenders is 9%. A warden suspects that this percent is higher if the sex offender is also a drug addict. Of the 396 convicted sex offenders who were also drug addicts, 51 of them became repeat offenders. 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: ? v Select an answer V (please enter a decimal) H1: ? 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 ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton proportion is significantly higher than 9% at a = 0.05, so there is statistically significant evidence to conclude that the population proportion of convicted sex offender drug addicts who…The recidivism rate for convicted sex offenders is 15%. A warden suspects that this percent is higher if the sex offender is also a drug addict. Of the 320 convicted sex offenders who were also drug addicts, 58 of them became repeat offenders. 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: Select an answer ✓ Ho: ? H₁: ? Select an answer ✓ c. The test statistic ? - d. The p-value = e. The p-value is ? ✓ a f. Based on this, we should g. Thus, the final conclusion is that ... (please enter a decimal) (Please enter a decimal) (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) Select an answer the null hypothesis. O The data suggest the population proportion is not significantly higher than 15% at a = 0.05, so there is statistically insignificant evidence to conclude that the population proportion of convicted sex offender drug addicts…The recidivism rate for convicted sex offenders is 11%. A warden suspects that this percent is lower if the sex offender is also a drug addict. Of the 364 convicted sex offenders who were also drug addicts, 33 of them became repeat offenders. What can be concluded at the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v Select an answer v (please enter a decimal) H:? 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.) %3D e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton proportion is significantly lower than 11% at a = 0.10, so there is statistically significant evidence to conclude that the population proportion of convicted sex offender drug addicts…
