d. Identify the IV and DV.e. Present a statistical statement of the results. Post-hoc results?f. Graph the results.g. Conclusions? Reject or retain the null? Explain the direction of the effects.h. Write a results section. A researcher is interested in differences among blondes, brunettes, and redheads interms of introversion/extroversion. She selects random samples from a college campus,gives each subject a test of social introversion, and comes up with the following:1.BlondesBrunettesRedheads172222435w26315

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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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People with headaches are randomly divided into two groups. One group gets pain medication, and the other does not. One hour later, the participants are asked about their pain. Is it an experimental study or an observational study?
A random sample of single males and single females (ages 21 to 76) was obtained. The sample includes those currently separated, divorced, or widowed. The subjects were given a trait and asked to respond whether the trait was a deal-breaker in terms of maintaining the relationship. The results of the survey are provided in the table for the trait "stubborn". Is there a significant difference between males and females who consider the trait "stubborn" a relationship deal-breaker? Use the a = 0.05 level of significance. Click the icon to view the survey results. State the null and alternative hypotheses. Ho: PM PF %3D Survey Results H1: PM + PF Determine the size of each sample. Trait: Stubborn = 544 Males Females NE = 556 Yes 174 189 (Type integers or decimals. Do not round.) No 370 367 Determine the sample proportion of each gender that considers stubbornness to be a relationship deal-breaker. Print Done PM PF = (Round to three decimal places as needed.)
) If we randomly sample 1,000 people from a large population, and ask them a yes-no question, what can we say about the relationship between p (the proportion of people who answer "yes" in the sample of 1,000) and p (the proportion of people who answer “yes" in the entire population)?
1.66 Views on immigration: 1160 randomly sampled registered voters from Tampa, FL were asked if they thought workers who have illegally entered the US should be (i) allowed to keep their jobs and apply for US citizenship, (ii) allowed to keep their jobs as temporary guest workers but not allowed to apply for US citizenship, or (iii) lose their jobs and have to leave the country. The results of the survey by political ideology are shown below. (Round all answers to the nearest hundredth of a percent) Conservative Moderate Liberal Total (i) Apply for citizenship (ii) Guest worker (iii) Leave the country (iv) Not sure 48 123 180 351 149 116 29 294 179 132 22 333 74 87 21 182 Total 450 458 252 1160 a) What percent of these Tampa, FL voters identify themselves as conservatives? 38.79 b) What percent of these Tampa, FL voters are in favor of the citizenship option? 30.26 c) What percent of these Tampa, FL voters identify themselves as conservative and are in favor of the citizenship option?…
A car dealership would like to test the hypothesis that a difference exists in the city gas mileage (miles per gallon when driven in the city) of three cars, Honda Insight, Hyundai Ioniq, and Toyota Camry. The following data represent the miles per gallon for a random sample of Honda Insight, Hyundai Ioniq, and Toyota Camry cars. Honda Insight Hyundai Ioniq Toyota Camry 40 35 35 36 37 34 37 37 31 38 34 36 38 34 33 36 36 35 Use Excel to perform a one-way ANOVA and state your conclusion using a = 0.05.
Read the study below carefully. Then answer the questions that follow by typing in the letter of the correct response. Rhianna hears that watching ASMR videos on YouTube can help with insomnia. She conducts a sleep study on 60 people who have difficulty sleeping by asking a simple random sample of 30 participants to watch at least 20 minutes of ASMR videos prior to sleeping and the remaining 30 participants to attempt to sleep without watching any videos. During the study, the subjects are connected to an EEG machine, which is used to measure brain activity. Rhianna analyzes the EEG results and concludes that those who watched the ASMR videos experienced a better quality of sleep than those who did not. i. Identify the treatments in Rhianna’s study. A. being connected to an EEG machine B. experiencing difficulty sleeping C. watching at least 20 minutes of ASMR videos D. watching at least 20 minutes of non-ASMR videos E. watching no videos prior to sleep F. all…
The 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.
This question refers to excavations at a national monument. One question the archaeologists asked was: Is raw material used by prehistoric Indians for stone tool manufacture independent of the archaeological excavation site? Two different excavation sites gave the information in the following table. Use a chi-square test with 5% level of significance to test the claim that raw material used for construction of stone tools and excavation site are independent. Stone Tool Construction Material Material Site B Row Total Basalt 768 547 1315 Obsidian 101 94 195 Pedernal chert Other Column Total 536 499 1035 179 1496 1228 2724 (a) What is the level of significance? State the null and alternate hypotheses. O Ho: Stone tool material and site are independent. H: Stone tool material and site are not independent. O Ho: Stone tool material and site are not independent. H: Stone tool material and site are independent. O Ho: Stone tool material and site are independent. H: Stone tool material and…
A sample of students from an introductory psychology class were polled regarding thenumber of hours they spent studying for the last exam. All students anonymously submitted thenumber of hours on a 3 by 5 card. There were 24 individuals in the one section of the course polled,and the data is as given below: 4.5, 22, 7, 14.5, 9, 9, 3.5, 8, 11, 7.5, 18, 20, 7.5, 9, 10.5, 15, 19, 2.5, 5, 9, 8.5, 14, 20, 8. Compute a 95 percent confidence interval.
A researcher wanted to know if there was a correlation between the number of times a boxer incurred head injuries (traumatic encephalopathy) to depression scores reported by the same individuals. The data for 10 boxers (number of injuries and depression scores from 0-10 where 0 means no depression) is as follows: Number of brain injury Depression Score 0 1 9 10 4 7 7 8 2 1 1 0 8 10 5 5 0 2 4 6 a. Use the four steps of hypothesis testing and calculate a Pearson correlation for the above data, starting with the hypotheses.b. Find critical value at an alpha level at α=.05, two tailed.c. Include the coefficient of determination with a sentence explaining the outcome of both calculations in APA format.d. Create a scatter plot by hand of the above data set.
An article reported that in a particular year, there were 717 bicyclists killed on public roadways in a particular country, and that the average age of the cyclists killed was 43 years. These figures were based on an analysis of the records of all traffic-related deaths of bicyclists on public roadways of that country. (a) Does the group of 717 bicycle fatalities represent a census or a sample of the bicycle fatalities for that year? O a census O a sample (b) If the population of interest is bicycle traffic fatalities for this particular year, is the given average age of 43 years a number that describes a sample or a number that describes the population? O a number that describes a sample O a number that describes the population
A random sample of 10 compact cars, 10 mid-size cars, and 10 luxury cars were selected. The time (in seconds) each of the randomly selected cars required to accelerate from 0 to 60 mph was looked up on the Autos.com website. The results are presented below. Car Type Time (in seconds) Required to Accelerate from 0 to 60 mph Compact 9.3 8.1 10.2 8.8 9.0 9.3 7.7 9.2 9.4 8.6 Mid-Size 6.9 5.7 8.3 7.7 8.6 5.9 6.1 8.8 6.1 7.2 Luxury 5.7 6.3 5.4 4.7 6.2 7.0 5.9 5.3 6.3 5.0 Conduct a hypothesis test using ! = 0.05 to determine whether the mean time required to accelerate from 0 to 60 mph is the same for compact, mid-size, and luxury cars. (No accounting or excel, I need help solving it.)

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