Ana is a Cognitive Psychologist and coffee lover.She decides to conduct a study investigating theimpact of coffee on quiz comprehension. Sherandomly assigns participants to either the coffeegroup or the placebo group. Thirty minutes beforethe study begins, participants are given either acup of coffee to drink (the caffeine group) or acup of decaffeinated coffee to drink (the placebogroup/no caffeine group) while they sit in thewaiting room. Participants are not told whetherthey are drinking regular coffee or decaffeinatedcoffee. Following the thirty minutes, participantsenter the lab and are asked to read a passage oftext. After a short delay, participants are given aquiz to complete where they answer a series of 10questions about the passage they read earlier. Anais measuring the number of correct answers onthe quiz. Unfortunately, one participant did notshow up, so Ana was left with unequal samplesizes: Five participants in the placebo group and 4participants in the caffeine group. Ana isinterested in determining if there is a difference inthe number of quiz questions correctly answeredin the caffeine group relative to the placebogroup.Use the data file, Caffeine.csv as needed toanswer the following:a. Conduct an independent-samples t-test byhand, showing how you calculated the t statistic.Please show work and calculations for each stepb. Run this independent-samples t-test in jamovi,to verify that you correctly calculated the t-teststatistic in a). Include a screenshot of the mainanalysis table from jamovi as your answer to thisquestion.c. Looking at your main analysis table fromjamovi you included in question b), make adecision about the null hypothesis using a .05.Why did you make this decision? you are usingthe p-value approach and jamovi to arrive at yourdecision, not the critical value approach. Group Quiz ScoreCaffeine 9Caffeine 10Caffeine 9Caffeine 8Placebo 7Placebo 6Placebo 4Placebo 8Placebo 5

Given,a psychologist performs a coffee test.The 2 independent samples were -coffee impact on quiz…

Answered: a. Conduct an independent-samples…

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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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.
Classify the two given samples as independent or dependent. Sample 1: The SAT scores for 33 high school students who did not take an SATpreparation course Sample 2: The SAT scores for 43 high school students who did take an SAT
12) Please provide a correct answer with a full method explanation and do not copy and past from other similar questions.
State the number of degrees of freedom available for determining the within-samples variation.
6) A researcher is interested in whether women like Justin Bieber's music more than men. The extent to which people liked Bieber's music was measured on a 10 point scale ranging from 1 = do not like at all, to 10 like Justin Bieber's music more than men (alpha = .05). very much like. Using the data below, please determine whether women Women Men 7 4 8 7 4 a) What type statistical analysis should you perform? Please explain your rationale b) Please state the null and alternative hypotheses c) Please write out the results (t-value, df, p-value) and make a decision d) Please make a general conclusion (no stats talk)
Another idea is to look at how a team's payroll impacts its home attendance. Higher payroll usually signals more higher-skilled players on a roster which should brings fans to the ballpark to see these players. Create 2 samples based on Team Salary and calculate average attendance, variance of attendance, and standard deviation of attendance for each sample. Sample 1 = 10 teams with the highest team salary Sample 2 = 10 teams with the lowest team salary Tip: Use Excel's sorting tool to sort the data by salary (highest to lowest), and copy the 10 highest and 10 lowest into a separate part of the spreadsheet for easier analysis. Sample 1 Sample 2 Top 10 Team Salary Bottom 10 Team Salary Sample mean attendance mil mil Sample attendance variance mil mil Sample attendance standard deviation mil mil Perform a hypothesis test to determine whether there is a difference in the mean attendance of teams between the two groups…
Help pls
The within subjects ANOVA may be used with
Table 1 summarizes the demographic and baseline data. Since two independent groups were included, the baseline data between these two groups were compared and p values were included in this table. Please tell which specific statistical test was used for the comparison between number of intubation attempts and trauma. Your answer should be as specific as possible. For example, was the test two-sided or one-sided? Was the test for paired samples or not?
Part 1: Hypothesis Test for the Mean- Manual Tasks• Define your concern of interest drawing upon your variables in your dataset.• Conceptualize your null and alternate hypotheses based on your testing concept.a. Apply 1 one-sided test (upper-tail or lower-tail) and 1 two-sided test concepts for the mean with unknown population standard deviation (�) at 1%, 5%, or 10% levels of significance (choose one of them for each test) by stating the appropriate decision rule. b. Calculate p-value for each of your tests and perform testing for your same hypotheses with p-value solution. Comment on how p-value changes for 1%, 5%, and 10% significance levels (for all three).**Here in order to apply normal distribution approximation, it would be better if you choose your sample size greater than 100 (n>100).c. Make a confidence interval estimation for the population mean with unknown variancebased on 90%, 95% and 99% confidence levels and make interpretations for all three. Data is: Name…
A professional marketing survey involves product recognition in New York and California. Of 558 New York residents surveyed, 193 knew the product while 179 out of 614 Californians knew the product. 1. Test the claim that the recognition rates are greater in New York. 2. In which state does the product need the most help with name recognition? Use the given data to compare mean age of residents in Seaside and Marina. Sample Data * = 43.2 yr s = 4.7 yr n = 97 Seaside Before After 1. Test the claim that the mean age of seaside residents is equal to the mean age of Marina residents. 2. How would the result change if we use a = 0.01? Matched Pairs: Write the alternative hypothesis H₁, for each claim: 1. New engine management software will increase the gas mileage in your car. 2. My coaching will reduce your golf score. Difference An instructor gives a test before and after a lesson with these results from randomly selected students Before and After Data 54 70 = 61 Marina 56 s = 6.7 year…
Q7: what is the answer for both parts to this question, answer choices are provided in the pictures

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