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- 9 Below are the results of two polls of random samples of high school seniors and juniors, who were asked if they approve of, disapprove of, or do not care about a proposed ban of energy drinks on high school campuses. Poll I Poll II Approve Disapprove Do Not Care Total Seniors 10 30 60 100 a. Compare the proportions of seniors and juniors who approve, disapprove, and do not care in the two polls. EDIT CALC TESTS Interval.... 8: Interval.... 9:2 amPZInt.... 8:2-9PTInt..... A: 1-Pro B: 2-Prop nt...... DUX2-Test..... Int...... Juniors 12 32 56 100 For each poll, use your calculator or computer software to compute a tablof expected counts and x². 554 File Data Edit Craph Sta DOUAX De HVIS MITANTS D 5 4 7 te 24 Aprove ALDRIVE De Care Toul E Serc 40 :50 Date A Approve Disapprove Do Not Care Total Regression Linear Quadratic Cubic Quartic Power tom Tools Help Test domizat Distribution stribution of male... Exponential Logarithmic Seniors Juniors 100 120 300 320 600 560 1,000 1,000 Polynomial…3. The data displays the number of days a vaccinated person infected with a certain virus is symptomatic, divided according to age group. Researchers wanted to know if age has anything to do with the length of time a person is symptomatic. They are testing at 0.05 significance level. 21-30 years old 31-40 years old 41-50 years old 7 4 5 6 3 7 3 6 5 6 7 3 7 For this problem, fill the missing values. (Use 5 decimal places) Source df S MS (4) (2) (3) Group 4.8 Error 12 26.8 Total 14 (1) a. (1) SST b. (2) MSG с. (3) MSE d. (4) FThe Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
- Course/Year 1. Brian, a college administrator, claimed that there was no difference in averages of students coming from three nearby schools A, B, and C. Use the following data to test his claim with a 1% significance level. Ex A-420 2x² 253 Ex B 340 SANOVA Table: 4 Source of Variation Between - column Within - column Total A A. Ho: B. a: 0.01 C. B C 3 _M₁ = M₁₂₁ = M²3 Sum of Squares 2.25 Compute for sum of squares D. Compute for degrees of freedom 84 88 88 E. Compute for mean sum of squares F. Compute for F-value 82 83 80 df 2 Ha: STUDENTS 89 82 89 Mean Sum of Squares 85 83 80 F-value Mr & Mr & M²₂ n₁ = √=n²₁₂₁ = 3 - N = 12 7 Critical Value / Tabular Value Decision4. If the sample size is 30 and the mean score for group one is 5.6, mean score for group two is 7.8, and mean score for group three is 4.8, what is the SS between of this study?46. For each scenario listed on the left, determine whether the scenario represents an (a)Independent or (b)Dependent Samples situation by placing the appropriate letter in the box provided. Comparing pain levels before and after treatment with magnetic therapy Comparing the number of speeding tickets received by men to the number received by women Comparing pre-test scores before training to post-test scores Comparing pain levels of a group receiving a placebo to a group receiving a medicine Independent Samples Dependent Samples
- Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 380 of the 581 randomly selected wildfires looked at in the south were caused by humans while 318 of the 503 randomly selected wildfires looked at the west were caused by humans. 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: Select an answer v Select an answer Select an answer v (please enter a decimal) Hj: Select an answer Select an answer vSelect 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 ? a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... |the null hypothesis. O The results are statistically significant at a = 0.10, so there is sufficient evidence to…471. Suppose the proportion of American adults who work at home is 40%. For a random sample of 100 American adults, what is the distribution of the sample proportion?
- Statement I. One way ANOVA will be utilized. Statement II. We are dealing with uncorrelated sample means. Statement III. We are dealing with correlated sample means. Statement IV. N is equal to 15. * Treatments Participant No Phone Hand-Held Hands-Free 1 4 1 2 3 1 2 3 6. 3 2 4 3 1 5 4 "Hypothetical data from an experiment examining driving performance under three telephone conditions. Statements I, Il are TRUE Statements I, II, I are FALSE Statements I, I, IV are TRUE O None of the above29. Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequently used to measure motivations and attitudes. A Likert scale is a: A. Discrete variable B. Ordinal variable. C. Categorical variable D. All of the options 30. A randomized experiment was done by randomly assigning each participant either to walk for half an hour three times a week or to sit quietly reading a book for half an hour three times a week. At the end of a year the change in participants' blood pressure over the year was measured, and the change was compared for the two groups. "This is a randomized experiment rather than an observational study because: * A. Blood pressure was measured at the beginning and end of the study. B. A random sample of participants was used. C. The participants were randomly assigned to either walk or rea, rather than choosing their own activity. D. The two groups were compared at the end of the study. E. Other 31. A researcher is interested in the…6. In December 2001, 38% of adults with children under the age of 18 reported that their family ate dinner together 7 nights a week. In a recent poll, 403 out of 1122 randomly selected adults with children under the age of 18 reported that their family ate dinner together 7 nights a week. Has the proportion of families with children under the age of 18 who eat dinner together 7 nights a week decreased? Use a 0.05 level of significance.