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- Question: One large course has 900 students, broken down into section meetings with 30 students each. The section meetings are led by GSI’s. On the final, the class average is 64, and the SD is 20. However, in one section the average is only 55. The GSI argues that: “If you took 30 students at random from the class, there is a pretty good chance they would average below 55 on the final. That’s what happened to me, and my teaching was as good as the other GSI’s” Is this a good defense? Answer yes or no and justify your answer.7:31 & o * * O 5G ll classroom.google.com NAME: DATE: PEF 5.4 Homework 4. Given: L is the midpoint of KM, LK = ZM Prove : Δ/KL Δ)ML Statement Reason 1. 1. Given 2. ZK = ZM 2. 3. 3. Definition of midpoint 4. 4. K] = MJ 5. 6. In Exercises 23 and 24, find the perimeter of the triangle. 23. 24. (21 - x) in. 7 in. (x + 4) in. (2x - 3) in.(x + 5) in. (4x + 1) in. IIRole-playing games like Dungeons & Dragons use many different types of dice. Suppose that a four-sided die has faces marked 1, 2, 3, and 4. The intelligence of a character is determined by rolling this die twice and adding 1 to the sum of the spots. The faces are equally likely, and the two rolls are independent. What is the average (mean) intelligence for such characters?
- Economy in Recession? The Quinnipiac University Poll conducts nationwide surveys as a public service and for research. This problem is based on the results of one such poll. Independent simple random samples of registered Democrats, Republicans, and Independents were asked, “Do you think the United States economy is in a recession now?” Of the 628Democrats sampled, 220 responded “yes,” as did 349 of the 471 Republicans sampled and 342 of the 646 Independents sampled. At the 1% significance level, do the data provide sufficient evidence to conclude that a difference exists in the percentages of registered Democrats, Republicans, and Independents who thought the U.S. economy was in a recession at the time?You are going to roll three standard six sided dice. The dice are distinguishable: one is red, and other is blue, and the third is yellow. How many different roles are there?10
- How many false positives were there? Explain the consequences of a false positive for the person tested.When playing games of chance like roulette, people often say that a particular outcome is due, implying that one income is more likely because it has not happened in a while. This is fallacy because in these examples of outcome of each trial is: a. independent b. dependent c. subjective d. interrelativeProblem C: Suppose that a sample of 200 respondents were asked about their preference on vacation places to go after the pandemic. Beaches Men Women 207 e1= ? 231 e3= ? Mountains 282 e2=? 242 e4 = ? Test if gender and preference of vacation places are associated.
- Which of the following is a research hypothesis? A. Liberals and conservatives have the same voting rates. B. The rates of that senior citizens receive moving violations are not different from rates of moving violations seen in teenagers. C. White and African Americans watch the same amount of TV. D. Men and women have different levels of income.A high school track coach wanted to test whether giving the students an energy drink could affect performance during the 100 meter race. The coach split the 26 boys into two equal sized groups, where Group 1 was given the energy drink and Group 2 was not. The 100 meter race times were recorded during practice and shown in the table below. What inference can be made about the results? Group 1 Group 2 12.2 13 12.5 12.3 13.3 12.8 12.9 13 13 13.8 12.1 13 13 13 13 13 12.1 13 13 13 12.1 13 12.8 13 13 12.6 Mean: 12.7 Mean: 13 Since the simulation shows ( many cases or free cases )? where a mean difference of ( solve for this answer ) or less occurred when the groups were re-randomized, it can be inferred that the mean difference observed in the study was ( very possibly or very unlikely ) ?due to the random assignment of participants into groups, so the results of the study are (…What type of statement is this? "Children of parents with college degrees are more likely to obtain college degrees themselves." a. research question b. research hypothesis c. research purpose statement d. Null hypothesis .
