A team of researchers is testing the effectiveness of a new HPV vaccine. They randomly divide the subjectsinto two groups.Group 1 receives the new HPV vaccine, and Group 2 receives the existing HPV vaccine.Neither the patients or the doctors examining them knew which group they were in.Which is the treatment group?O Group 1O Group 2O Neither groupWhich is the control group (if there is one)?O Group 1O Group 2O No control groupIs this study blind, double blind, or neither?O BlindO Double-blindO Neither> Next Question31

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A pharmaceutical company is testing the effectiveness of its vaccine across two different age brackets. They take a sample and split the participants up into two separate groups. Group A consists of 44 people who are between ages 13 and 18. Group B consists of 58 people between ages 19 and 26. After being administered the vaccine, it was found that 37 people from group A were immune to the virus and 42 people from group B were immune. (this is the same situation from the previous daily) Why do we use the 'pooled proportion' instead of the null hypothesis in the denominator of the test statistic? At a 10% significance level, is there reason to believe there is a difference in vaccine efficacy between Group A and Group B? explain each step
2. A study for adverse reactions assigned adults at random to one of two common pain relievers (ibuprofen and acetaminophen). It was found that out of 733 adults who were administered ibuprofen, 103 of them experienced an adverse reaction, and out of 732 adults who were administered acetaminophen, 85 of them experienced an adverse reaction. Let p1 denote the proportion of adults who experience an adverse reaction when taking ibuprofen and let p2 denote the proportion of adults who experience an adverse reaction when taking acetaminophen. Suppose we want to answer the following questions. i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse reaction when taking ibuprofen is greater than the proportion of adults who experience an adverse reaction when taking acetaminophen. ii) Calculate the 97% confidence interval for p1 - P2. The table below provides the information needed to perform the hypothesis test: Value x1 103.0000 85.0000 733.0000…
4. A graduate student in Health and Human Performance is interested in the effects of background noise on learning. He finds 18 undergraduate students who are willing to be part of the experiment. Well, the $100 Amazon gift card made it easy to find participants quickly. In any case, the students were randomly assigned to one of three treatments: 1) constant background noise; 2) random background noise; and 3) no background noise. The students were given material to study for one hour under these conditions. After that one hour, each student took a 20-point multiple-choice test. The scores for each student were as follows: constant noise: 16,17,14,15,16,13 random noise: 18,13,12,15,12,11 no noise: 20,19,18,16,15,17 a) What are the null and alternative hypotheses for this study? What statistical test should be used for this study? Justify your answer. b) Calculate your appropriate test statistic. Please show all of your work. c) Assume that the graduate set α to 0.05 during the…
AD (Alzheimer's disease) causes progressive cognitive impairment. A diagnostic blood test for AD was proposed. An evaluation of the blood text involved fifty known AD patients and forty control who did not have AD. Of those who had AD, forty eight tested positive on the blood test and two tested negative. Of those without AD, three tested positive on the blood test and thirty seven tested negative. c. How many people who did have AD tested negative on the blood test? What is the name for this kind of test result?
Consider the following ANOVA table for a multiple regression model relating housing prices (in thousands of dollars) to the number of bedrooms in the house and the size of the lot on which the house was built (in square feet). There were 9090 total observations. Estimated Price=20,160.07+2188.83(Bedrooms)+0.2139(Lot Size)Estimated Price=20,160.07+2188.83(Bedrooms)+0.2139(Lot Size) ANOVA dfdf SSSS MSMS F� Significance F� Regression 22 306,443.7975306,443.7975 153,221.8988153,221.8988 21.727421.7274 2.2211E-082.2211E-08 Residual 8787 613,525.5190613,525.5190 7052.01757052.0175 Total 8989 919,969.3165919,969.3165 What percent of variation in housing prices is explained by the number of bedrooms and lot size? Round your answer to two decimal places
Please help me answer this with complete solution.
A marketing organization wishes to study the effects of four sales methods (Method 1, 2, 3, & 4) on the weekly sales of a product. The organization employs three salesmen (A, B, & C) to use each sales method. The weekly sales made by each salesman using four different methods are shown in the table below. Sales Method/S A B C 1 32 29 30 2 32 30 28 3 28 25 23 4 25 24 23 a) Run the ANOVA at 0.05 level of significance based on the provided data. Copy the Excel output below. b) Based on the output, test the null hypothesis H0that no differences exist between the effects of the sales methods (treatments) on mean weekly sales. Can we conclude that the different sales methods have different effects on mean weekly sales?
2. A study for adverse reactions assigned adults at random to one of two common pain relievers (ibuprofen and acetaminophen). It was found that out of 733 adults who were administered ibuprofen, 103 of them experienced an adverse reaction, and out of 732 adults who were administered acetaminophen, 85 of them experienced an adverse reaction. Let p1 denote the proportion of adults who experience an adverse reaction when taking ibuprofen and let p2 denote the proportion of adults who experience an adverse reaction when taking acetaminophen. Suppose we want to answer the following questions. i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse reaction when taking ibuprofen is greater than the proportion of adults who experience an adverse reaction when taking acetaminophen. ii) Calculate the 97% confidence interval for p1 - P2. The table below provides the information needed to perform the hypothesis test: Value x1 103.0000 85.0000 733.0000…
2. A study for adverse reactions assigned adults at random to one of two common pain relievers (ibuprofen and acetaminophen). It was found that out of 733 adults who were administered ibuprofen, 103 of them experienced an adverse reaction, and out of 732 adults who were administered acetaminophen, 85 of them experienced an adverse reaction. Let p1 denote the proportion of adults who experience an adverse reaction when taking ibuprofen and let p2 denote the proportion of adults who experience an adverse reaction when taking acetaminophen. Suppose we want to answer the following questions. i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse reaction when taking ibuprofen is greater than the proportion of adults who experience an adverse reaction when taking acetaminophen. ii) Calculate the 97% confidence interval for p1 - P2. The table below provides the information needed to perform the hypothesis test: Value x1 103.0000 85.0000 733.0000…
2. A research firm tests the miles per gallon characteristics of three brands of gasoline. Because of different gasoline performance characteristics in different brands of automobiles, five brands of automobiles are selected and treated as blocks in the experiment; that is, each brand of automobile is tested with each type of gasoline. The results of the experiment (in miles per gallon) is given in Table 2. Table 2 Gasoline Brands Automobiles I II III A B D E a. How many factors and treatments involved in the study? State the factors and list all the possible treatments b. State the independent and dependent variables c. You are required to randomly generate data to fill up Table 2 using random number generator in Microsoft Excel. Please follow the following requirements: i. The data value should be within the range (18, 34). 11. The number of data for each treatment must be the same. (at least two data for each treatment) d. Based on your answer in (c), is there any interaction effect…
2 A researcher recruits 80 students for a study. Half of the students attend a review session for an exam. The remaining students study as they normally would for the exam. After the exam, the researcher compares the scores of the two groups. Identify the control group. A: All the students in the study B: The students who attend the review session C: All the students who take the exam D: The students who study as they normally would
A team of researchers is testing the effectiveness of a new HPV vaccine. They randomly divide the subjects into two groups.Group 1 receives no vaccine, and Group 2 receives the new HPV vaccine.The patients in the study do not know which group they are in.Which is the treatment group? Group 1 Group 2 Neither group Which is the control group (if there is one)? Group 1 Group 2 No control group Is this study blind, double blind, or neither? Blind Double-blind Neither Which best describes this research? Survey Observational Study Experiment

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