il T-Mobile 11:43 am 46% Home Edit Yesterday 5:52 pm Field of Study Male Female TOTAL Medicine 80 40 120 Business 60 20 80 Engineering 160 40 200 TOTAL 300 100 400 To determine if the field of study selected is independent of gender, a Test for Independence was conducted. Refer to Exhibit 7. The correct alternative hypothesis (Ha) for this Test of Independence is Ha: Field of study is independent of gender Ho: Field of study equals gender O Ha: Field of study is NOT independent of gender Ha: Pmale = P female Question 42 2 pts
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- A company manager wants to compare the satisfaction levels of his customers from two stores belonging to his company. According to his research, 249 out of 300 people are satisfied with shop A, and 348 out of 400 people are satisfied with shop B. Which of the following hypothesis states that there is a significant difference between customer satisfaction levels? H0 : P1 < P2, H1 : P1 ≥ P2 H0 : P1 ≥ P2, H1 : P1 < P2 H0 : P1 > P2, H1 : P1 < P2 H0 : P1 = P2, H1 : P1 ≠ P2 H0 : P1 ≠ P2, H1 : P1 < P2When is a researcher at risk of making a Type II error? Group of answer choices: whenever H0 is rejected whenever H1 is rejected whenever H0 fails to be rejected The risk of a Type II error is independent of the decision from a hypothesis test.A researcher hypothesizes that Drug A is more effective than Drug B. In conducting an analysis to test this hypothesis, how should the null hypothesis be stated? a. H0: μDrug A = μDrug B b. H0: μDrug A > μDrug B c. H0: μDrug A ≠ μDrug B d. H0: μDrug A < μDrug B
- When is a researcher at risk of making a Type II error? a. whenever H1 is rejected b. whenever H0 fails to be rejected c. whenever H0 is rejected d. The risk of a Type II error is independent of the decision from a hypothesis test.When is a researcher at risk of making a Type II error? a. whenever H0 is rejected b. whenever H1 is rejected c. whenever H0 fails to be rejected d. The risk of a Type II error is independent of the decision from a hypothesis test.The health board of a major city wants to know if people who have different types of healthcare coverage (HMO, Medicare/Medicaid, or no insurance) go to different types of hospitals (privately-funded, government-funded, or free clinic) when they are injured. Using the data below, test the null hypothesis that type of insurance does not affect which hospital type they choose. Insurance Type Private Public Free Clinic HMO 17 6 4 Medicare/Medicaid 24 30 9 No insurance 8 14 8
- In a study of the effects of mediation on anxiety, participants were randomly assigned to either engage in a mindfulness meditation session for 5 minutes or to sit quietly for 5 minutes. All participants then completed an anxiety measure. The researchers predicted that there would be a difference in anxiety scores between the two groups. Which would be the appropriate null hypothesis? a. H0: u 1 > u 2 b. H0: u 1 = u 2 c. H0: u 1 < u 2 d. H0: u 1 > u 2The following table presents results from a simulated shopping and in-home product use test for a new toilet tissue from P&G's Charmin. The new brand, Charmin All Purpose, was positioned to compete against Private Labels (store brands) and as such was priced lower than brand Charmin. Stimulated Shopping Call Back Charmin All Purpose Charmin Private Label Totals Charmin All Purpose 100 80 20 200 Charmin 50 300 50 400 Private Label 50 100 250 400 200 480 320 1000 Assume the P&G is comfortable that 95% of households will be aware of the new Charmin brand and that it will have an ACV of .95. What is your estimate of the first year share that Charmin All Purpose will achieve? What, if any, are the positives coming out of this test? What, if any, are the negatives?A medical device company has developed a new needle that they claim reduces the incidence of injection-site reactions for a particular medication. An experiment is to be conducted to determine if there is sufficient evidence to make that claim. Which of the following is a correct description and consequence of a Type II error? A. A Type II error would occur if the medical device company incorrectly administers the medication with the new needle, causing it to be impossible to determine whether the number of injection-site reactions have increased or decreased with the new needle. B. A Type II error would occur if, in reality, the new needle does not reduce the incidence of injection-site reactions, but the significance test detects such a difference. The consequence of such an error would be that the medical device company would produce this new needle, but it would not be beneficial. C. A Type II error would occur if, in reality, the new needle reduces the incidence of…
- An experiment was conducted to test whether students’ performance (above or below average) is independent of stress level as a result of pressure on time table for the term in Hwanhwan Senior High School. The table below gives a 3 × 2 contingency table of the sample.Above Average Average Below AverageTOTALStressed 135. 250 285 670Not stressed 150 157 107 414TOTAL. 285 407 392 1084With the help of chi-square test statistics X2= ∑(oi - eij)/eij, determine whether students’ performance for the selected term in the school is independent of their stress level experienced from the time table at a = 0.05.A U.S. Food Survey showed that Americans routinely eat beef in their diet. Suppose that in a study of 49 consumers in Illinois and 64 consumers in Texas the following results were obtained from two samples regarding average yearly beef consumption: Illinois Texas = 49 = 64 = 54.1lb = 60.4lb S1 = 7.0 S2 = 8.0 Formulate a hypothesis so that, if the null hypothesis is rejected, we can conclude that the average amount of beef eaten annually by consumers in Illinois is significantly less than that eaten by consumers in Texas.A survey of high school girls classified them by two attributes: whether or not they participated in sports and whether or not they had one or more older brothers. Participated In sports Participated In sports Older brother Yes No Total Yes 12 8 20 No 13 27 40 TOTAL 25 35 60 A) Use the following data to test the null hypothesis that these two attributes of classification are independent. B) Suppose we do the below hypothesis test instead: H0: P1 - P2 = 0 H1: P1 - P2 ≠ 0 where, P1 ==>Propotion of young girls participated in sports of those who have a brother P2 ==> Propotion of young girls participated in sports of those who do not have a brother. What would be the test statistic and the p-value for this test?