Question 15The most important quality of a test or assessment instrument is objectivity.TrueO FalseQuestion 16A group of students completes the 12-minute run prior to a six-week jogging unit. At the end of the unit, the 12-minute runtest is administered a second time. The instructor is interested in knowing if there is a statistically significant difference in theresults of the two tests. To answer this question, the appropriate statistical test would be:O Independent Samples T-TestO the dependent sample T-TestO multiple regression analysis.The One Sample T-TestO simple analysis of variance.ts

“Since you have posted multiple questions, we will provide the solutiononly to the first question as…

Answered: Question 15 The most important quality…

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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What are the degrees of freedom for this test? d.f.= What is the p-value for this sample?
Which of the following statistical methods should you use. Question is at top of page
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
Dr. Carlton conducts a study to determine the effectiveness of a new intervention for those suffering from eating disorders. He compares patients' weights before the intervention to the same patients' weights after the intervention. What is the appropriate statistical test? a. paired samples t test b. between-subjects, one-way ANOVA. c. independent-samples t test d. Mann–Whitney U test
Which of the following is NOT a misuse of statistics?Choose the correct answer below.A.Utilizing valid statistical methods and correct sampling techniquesB.Concluding that a variable causes another variable because they have some correlationC.Misleading graphsD.Making conclusions about a population based on a voluntary response sample
A) What is the mean difference score, MD? (Hint: fill in the difference column using TMS - minus - Sham) a. 4 b. 5 c. 20 d. 4.2 B) What is the sample variance, s2, for the difference scores? a. 7.2 b. -9 c. 8.5 d. 9
Researchers were interested in assessing whether stress levels are different at the beginning of the semester compared to finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week. Participant Stress 1 Stress 2 1 22 22 2 32 34 3 24 25 4 28 30 5 26 29 What test should be used to test for differences in stress at these two time-points? Select one: a. paired samples t-test b. independent samples t-test c. Pearson correlation d. single sample t-test
What are the values for SS and variance for the following sample of n = 3 scores? Sample: 8, 5, 2
Consider the following research questions/study scenarios. For each study, discuss the most appropriate methods for describing the data (graphically and numerically). What statistical method would be most appropriate for addressing the research questions? Be sure to provide a justification of the statistical method. What statistical test is needed, provide appropriate null and research hypotheses. An investigation of the association between drink preferences and the color of teeth is proposed. Subjects will be surveyed as to the type of drink most often consumed (coffee/tea. Juice, caramel-colored soda, water, or milk). A clinical exam will be performed after dental cleaning to determine the color of the teeth (reddish brown, reddish yellow, gray, reddish gray).
a) Work this problem manually (by hand) using the procedures and formulas for ANOVA to check if the Population Means for flying time before major maintenance is required are the same for the three types of aircraft. To help you, Sample Means and Sample Variances have been calculated below for you: Airbus Boeing737 Boeing 787 6.4 8.7 9.9 7.8 7.4 12.8 5.3 9.4 12.1 7.4 10.1 10.8 8.4 9.2 11.3 7.3 9.8 11.5 __________________________________________________________________ Sample Mean 7.1…
6. The three data sets have the same mean and range, but is the variation the same? Prove your answer by comput- ing the standard deviation. Assume the data were ob- tained from samples. a. 5, 7, 9, 11, 13, 15, 17 b. 5, 6, 7, 11, 15, 16, 17 c. 5, 5, 5, 11, 17, 17, 17
For a repeated-measures ANOVA, if SSbetween subjects = 23 and SSwithin treatments = 64, then SSerror = _____. a. 41 b. 25 c. 2.78 d. 87

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