Answered: 1 Do you drink coffee or caffeine…

1 Do you drink coffee or caffeine before schoolwork? Number of students 2 Yes 3 No 4 Sum 5 6 If yes, do you believe it helps with your grades? 7 Yes 8 No 9 Sum 10 Number of students 10 10 20 4 6 10

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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To investigate how people communicate over the internet, a researcher had subjects write messages in an online forum. She split her sample of 76 participants into young adults and older adults based on their age. She then compared how many emojis and emoticons the young adults used in their messages compared to the older adults. What is the best test to analyze the results of this study? One Sampe Z Test One Sample t Test Independent Samples t Test Dependent Samples t Test
Does more education lower a person’s level of prejudice? The number of years of education and the score on a prejudice test for ten people is given in the following table. Higher scores on the test indicate more prejudice. Years of Education: 12, 15, 14, 13, 18, 10, 16, 12, 10, 4 Score of Prejudice Test: 1, 6, 2, 3, 2, 4, 1, 5, 5, 10 Conduct a hypothesis test to determine if there is a significant linear correlation between the two variables. If there is a significant linear correlation between the variables, determine the regression equation. There is a significant correlation between the variables and the regression equation is y' = 10.5 - 0.532x There is a significant correlation between the variables and the regression equation is y' = - 0.532 + 10.5x There is not a significant correlation between the variables, so the regression equation should not be determined. There is a significant correlation between the variables and the regression equation is y' = 16.509 - 1.054x
A researcher wants to conduct an experiment to determine which environment is best suited for studying - a library, in one's own room, or outside. A total of 30 university students volunteer to participate in the experiment. The researcher believes that gender has an effect on the results. What are the treatments in the experiment?
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Moral judgments about a harmful behavior are expected to be associated with one’s ability to recognize how hurt the victim of the harmful behavior is. To test this a replication of the Malti and colleagues (2012) was attempted. Researchers asked 12- and 15-year-olds whether they thought it was okay to exclude a Serbian peer from going to a soccer match (1 = really not okay, 7 = really okay) and how they thought the Serbian peer would feel if he/she was not invited to the soccer match (1= very bad, 7 = very good). The results for 12 of these adolescents are below: 1. Find the correlation, r, between exclusion judgments and evaluations of the victim’s feelings (assuming the researcher wanted to use the 1 to 7 scale as a numerical interval score). Q: r= ? 2. Describe this correlation and what does this correlation indicate about the relation between exclusion judgments and evaluations of the victim’s feelings?
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You want to study whether music affects people’s ability to learn. You have 10 college students study a list of words with soft classical music playing, then you test how many words they correctly remember. You have 15 different college students study a list of words with loud heavy metal playing, then you test how many words they correctly remember. You want to compare the learning/memory of the two different groups. What kind of hypothesis test should you do? One-Sample z-test One-Sample t-test Independent-Samples t-test Related-Samples t-test
A research study wanted to examine whether religious belief and gender are related in their state. They selected a representative sample of men and women in their State.Select the null and alternative hypothesis of the test: H0: there is no relationship between gender and belief about human originsHa: there is a relationship between gender and belief about human origins H0: there is a relationship between gender and belief about human originsHa: there is no relationship between gender and belief about human origins Results of the study are summarized in this table for the Belief about human origins: religious texts evolutionary theory total male 30 36 66 female 110 89 199 total 140 125 265 The degrees of freedom for the the ?2 statistic are Round the following numbers to two places after the decimal:The test statistic is ?2 = with a p-value = The conclusion of the test at the 5% significance level is There is not enough statistical evidence to suggest that gender…
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During the pandemic, an HR manager randomly assigned 6 employees to work from homeand the other 6 employees to work from the office as usual. After three months, all 12employees’ job performance was tested. Scores for those working from home were 10, 12,14, 13, 11, 12, and scores for those who worked from the office were 8, 6, 10, 8, 9, and 7.The HR manager then compares the scores from both groups to determine which groupscores significantly higher.Based on the experiment above,a) Carry out a t-test using five steps of hypothesis testing with the 0.05 level ofsignificance at one-tailed. Explain your finding.b) Sketch the t-distribution involved.
One of the basketball coaches chose 45 players for the purpose of knowing their running speed and scoring on the net, for the purpose of creating a good team20 players have good running speed and net scoring is good 7 players have good running speed but net scoring is not good 8 players have bad running speed but net scoring is good 10 players have bad running speed and net scoring is not good Test at 5% level The importance of whether the running speed and scoring on the net are independent