t =n(E D)- (E D)n -1n = number of pairs of scores (for example, if 8 people are measured at tl and t2, df = 8-1 = 7)D= the difference between each pair of scoresED = the sum of the differences(ED") = the sum of the squares of the differences(ED)= the sum of the differences squaredt score: Independent Samples t-test (degrees of freedom = (ni – 1) + (n2 – 1))Z. - Z.+Vn, -1'n, - 1X - mean of first group (sample)X:- mean of second group (sample)s21 = sample variance of first groups?, = sample variance of second groupn1 =number of subjects (or observations) in the first groupn, = number of subjects in second group2=rBe careful about computing the denominator; pay attention to whether you are working with sample variances or standarddeviations to make sure your computations are correct.One Way ANOVA (see ANOVA table for degrees of freedom)Between Groups Sum of Squares: Subtract the grand mean from each group mean, square the deviation,multiply by n in each group and add the values together.SSu = En (X,- Xn = the number of subjects or observations in a groupX, - the mean for any group (1 through n) of subjectsX = the overall, or grand, mean for all subjects or observationsWithin Groups Sum of Squares: Subtract each group's mean from the individual scores and add them all up.SSw - EE (X-X.jX = any single score within any particular groupX,- the mean of any particular groupnG = number of groupsN= total # of subjects/observationsdfMSFTreatment(Between= B)SS.df, =MS, =ss, / df,MS=SSw/ dfwF =MS, /MSwn-1dfw =N - ngError (Within W) SSTotalSStotal =ss, + SSwdfrotal =3DN -1 =df,+ dfyFrequently Used Z Critical Scoresa levelOne-tailed (left)Two-tailedOne-tailed (right)a 0.052-1.6421.6421.96a= 0.012=-2.33z= 2.332= 2.57a= 0.001 2=-3.08z3.0823.32 Hypothesis Testing1. Harris (2020) tested levels of well-being in subjects with chronic anxiety undergoing brief therapy with mildpsychedelics three months before and again three months after the administration of a single session of therapy. The well-being scores for the 16 subjects are listed in the “Before" and “After" columns in the Table below:Well-Being ScoresSubjectBeforeAfterA125133B9612611511510811993124F98109G9572H120104107113126118K102121L116115M809410587123121110118Use the data provided in the table to test whether well-being changed significantly from immediately before to 3 monthsafter the session. Set alpha at .05.a) Write a null and alternative hypothesisb) Determine the critical value and draw the comparison distribution with the rejection region(s) indicatedc) Compute the relevant statisticd) Make a statistical decision (regarding the null hypothesis)e) Write a conclusion based on the specific research question

As per our guidelines, we are allowed to answer first three sub-parts only. Thanks In the…

Answered: Hypothesis Testing 1. Harris (2020)…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The chart below shows the percentage of people in a questionnaire who bought or leased the listed car models and were very satisfied with the experience.Model A 81%Model B 79%Model C 73%Model D 61%Model E 59%Model F 57% The empirical probability that a person with a model shown is very satisfied with the experience is 81/100. What is the model? Group of answer choices F C A B
The college physical education department offered an advanced first aid course last summer. The scores on the comprehensive final exam were normally distributed, and the z-scores for some of the students are shown below. Robert 1.24 Juan 1.66 Haley −1.84 Joel 0.00 Jan −0.84 Linda 1.68 Which of these students scored above the mean? (Select all that apply.) Which of these students scored on the mean? (Select all that apply.) Which of these students scored below the mean? (Select all that apply.) If the mean score was μ = 140 with standard deviation σ = 15, what was the final exam score for each student?
R %24 FE %#3 %24 Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 374 of the 522 randomly selected wildfires looked at in the south were caused by humans while 390 of the 563 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: :0H H1: Select an answer Select an answer Select an answer (please enter a decimal) Select an answer Select an answer Select an answer (Please enter a decimal) c. The test statistic ? O (please show your answer to 3 decimal places.) d. The p-value (Please show your answer to 4 decimal places.) e. The p-value is ? e a f. Based on this, we should elect an answer the null hypothesis. g. Thus, the final conclusion is that O The results are statistically insignificant at a = 0.01, so there is statistically…
Number of Flights Arriving on Time Number of Flights Arriving Late Sunshine Airline 33 5 Comfort Airlines 43 6 The table above contains data from a study of two airlines - Sunshine Airlines & Comfort Airlines - which fly from BWI to Shore City, FL. If one flight is selected, find P (on time and Comfort Airlines).
An economist wonders if corporate productivity in some countries is more volatile than in other countries. One measure of a company's productivity is annual percentage yield based on total company assets.A random sample of leading companies in France gave the following percentage yields based on assets. 4.6 5.4 3.4 3.1 2.4 3.5 2.8 4.4 5.7 3.4 4.1 6.8 2.9 3.2 7.2 6.5 5.0 3.3 2.8 2.5 4.5 Use a calculator to verify that the sample variance is s2 ≈ 2.109 for this sample of French companies.Another random sample of leading companies in Germany gave the following percentage yields based on assets. 3.3 3.2 3.2 4.1 5.4 5.5 5.0 5.4 3.2 3.5 3.7 2.6 2.8 3.0 3.0 2.2 4.7 3.2 Use a calculator to verify that s2 ≈ 1.077 for this sample of German companies.Test the claim that there is a difference (either way) in the population variance of percentage yields for leading companies in France and Germany. Use a 5% level of significance. How could your test conclusion relate to the…
Pain medications sometimes come with side effects. One side effect is dizziness. A researcher wanted to determine if some pain medications produced more or less dizziness than others. The results from his study are shown in the table below. Use a test to determine if the proportion of people within each treatment group who experienced dizziness are the same at the α= .01 level of significance. Tordol Placebo Naproxen Tylenol Advil Dizziness 83 32 36 5 8 No dizziness 4063 1832 1330 382 337 1) Determine the null and alternative hypotheses. Select the correct pair. Ho: The proportion of people within each treatment group who experienced dizziness are the sameHa: The proportion of people within each treatment group who experienced dizziness are different Ho:The proportion of people within each treatment group who experienced dizziness are independentHa:The proportion of people within each treatment group who experienced dizziness are dependent 2) Determine the…
B PLEASE!!
A psychologist would like to examine the effects of a new drug on the activity level of animals. Three samples of rats are selected with n=5 in each sample. One group gets no drug, one group gets s small dose, and the third group gets a large dose. The psychologist records the activity level for each animal. The data from this experiment are presented below. No drug Small dose Large dose 5, 3 , 1 , 1 , 5 5, 5, 9, 6, 5 10, 12, 9, 6, 8 =3, SS=16 =6, SS=12 =9, SS=20 Do these data indicate any significant differences among the three groups? Test with α=0.05. Compute the effect size and interpret the result.
A research group is conducting an experiment to study the relationship between fitness levels and the number of hours spent exercising each week. Subjects are randomly selected and, after several fitness tests, are assigned a fitness score. The number of hours spent exercising per week is also recorded. Data for 15 subjects are given below. Subject Hours of Exercise per Week Fitness Score 1 1 3 2 1.5 4.7 3 1.75 6 4 2 5 5 2 6.5 6 4.5 14.2 7 2.5 13.5 8 3.25 15 9 3 13.4 10 3.75 14 11 3.5 10 12 4 10 13 2.5 12 14 5.25 14.5 15 5 15 Create a bar graph in MicrosoftÂ® ExcelÂ® using the data. Label the graph and include the source of the data. Construct an equation in two variables that models this relationship. This equation may be linear, polynomial, rational, square root, or variation? Is the equation an exact model or an approximate model of the relationship between the variables? Explain your reasoning. Use the equation to make a prediction of the likely value of the…
College students and STDs: A recent report estimated that 25% of all college students in the United States have a sexually transmitted disease (STD). Due to the demographics of the community, the director of the campus health center believes that the proportion of students who have a STD is higher at his college. He tests H0: p = 0.25 versus Ha: p > 0.25. The campus health center staff select a random sample of 150 students and determine that 43 have been diagnosed with a STD. Conduct a hypothesis test to address the director’s hypothesis. Use a 5% significance level to make your decision. Use the applet to determine the P‑value. Click here to open the applet. Which of the following is an appropriate conclusion based on the results? The data provides strong evidence that the proportion of students at his college who have a STD is more than 25%. The data suggests that the proportion of students at his college who have a STD is 29%. Of the students surveyed at his college, 29%…
The number of hours 13 students spend studying and their test scores are given below.Hours Spend Studying 0 1 2 4 4 5 5 5 6 6 7 7 8Test Scores 40 41 51 48 64 69 73 75 68 93 84 90 95A) Which is the predictor variable, and which is the response variable?
Which of the following would not be considered

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS