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- In the Salsberry (2003) study shared in this weeks module, the researcher presents the following results of the statistical analysis: "With respect to family configuration, 20% of the children enrolled in Medicaid, 29% of the uninsured children, and 44% of the privately insured children were in families where the adults were in a “partnered relationship”, [χ2 (2,N = 392) = 21.95; P = .0001]" In this statement, what does the 2 indicate in this part of the statement (2,N=392).When a new drug is created, the pharmaceutical company must subject it to testing before receiving the necessary permission from the Food and Drug Administration (FDA) to market the drug. Suppose the null hypothesis is "the drug is unsafe." What is the Type II Error? a- The Type II Error would be to claim the drug is unsafe when, in fact, it is unsafe. b- The Type II Error would be to claim the drug is unsafe when, in fact, it is safe. c- The Type II Error would be to claim the drug is safe when, in fact, it is safe. d- The Type II Error would be to claim the drug is safe when, in fact, it is unsafe.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 < P2
- When using the 4 step hypothesis testing method, the alternative hypothesis __________? a. is symbolized by: H1 b. is symbolized by: H0 c. states that the two population means are equal d. must be directional in nature (must be a one tailed test)A large manufacturing firm is being chargedwith discrimination in its hiring practices.(a) What hypothesis is being tested if a jury commitsa type I error by finding the firm guilty?(b) What hypothesis is being tested if a jury commitsa type II error by finding the firm guilty?b) Persons who visit the restroom of a certain fast-food outlet were asked to state theiropinion of the quality of the restroom facilities, The following tables show the responsesfrom a sample of 100 persons.Gender of Respondent TotalsMale FemaleQuality ofFacilitiesAbove Average 8 7 15Average 26 24 50Below Average 7 28 35Totals 41 59 100A ?2test is carried out to determine whether there is an association between the gender ofpersons and their opinion.i) State appropriate null and alternative hypotheses ii) Determine the critical region of the test at the 1% level of significance iii) Calculate the value of your test Statistic iv) What is your conclusion for this test. Give a reason for your
- 11. A TWISTER spinner has four outcomes; red, blue, yellow, green. Ryo is testing if the proportion of redoutcomes is greater than 25%. After completing the test, Ryo has rejected the null hypothesis. Whichof the following represents the best conclusion?A. The data provides sufficient evidence that the proportion of red outcomes is greater than 25%B. The data does not provide sufficient evidence that the proportion of red outcomes is greaterthan 25%If I conduct a hypothesis testing with type 1 error set at 0.5 and a resulting p-value of 0.3 what would my conclusion beBecause 25 percent of the students in my morning statistics class watch eight or more hours of television a week, I conclude that 25 percent of all students at the university watch eight or more hours of television a week. The most important logical weakness of this conclusion would be? a. Relying on a sample instead of surveying every student b. Using a sample that may not be representative of all students c. Failing to correct for unconscious interviewer bias d assuming cause and effect where none exists
- If you use a 0.05 level of significance in a two tail hypothesis test, what decision will you make if z = +2.21?In a recent sample of 250 households, 45% of them owned a video game console. A hypothesis test was performed using the following hypotheses: Họ : p = 0.40 vs. H, : p> 0.40. A Type II error for this hypothesis test is: To conclude that 40% of households own a video game console when, in reality, it is more than 40%. To conclude that 40% of households own a video game console when, in reality, it is equal to 40%. To conclude that r than 40% of households own a video game console when, in reality, it is more than 40%. To conclude that more than 40% of households own a video game console when, in reality, it is equal to 40%.A teacher is comparing the mena study time of his freshmen and senior students. He believes that his senior students spend more time studyin per week than his freshmen studnet and decides to perform a hypothesis test on his belief. a. Suppose the decision of the hypothesis test is to reject the null hypothesis. If, in realiry, treshmen study for a mean of 10 hours per week and seniors study for a mena of 15 hours per week, was an error made? if so, what type? b. Suppose the decision of the hypothesis test is to fail to reject the null hypothesis. if, in realiry, freshmen study for a mena of 15 hours per seek and seniors study for a mean of 15 hours per week, was an error made? is so, what type?