2. An experiment is conducted in which four treatments are to becompared in five blocks. The following data are generated:BlockTreatments12345112.810.611.710.711.0211.714.211.89.913.8311.514.713.610.715.9412.616.515.49.617.1Test the hypothesis at the 0.05 level of significance that there is nodifference between treatment means. This time, instead of using afixed-effects model, assume a random-effects model.

Randomized block design is also known as randomized complete block design. Such treatments in each…

Answered: 2. An experiment is conducted in which…

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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Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer O Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. O As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election. 39 said yes. O of 351 dog owners who were surveyed, 70 reported owning two dogs. The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.
Q. 1 Independent random samples of 15 mid-western and 14 southern households provided the following data for household vehicle miles of travel in thousands. Midwest South 16.2 12.9 17.3 22.2 19.2 9.3 14.6 18.6 10.8 24.6 20.2 15.8 11.2 16.6 16.6 18.0 12.2 20.1 24.4 20.3 20.9 16.0 17.5 18.2 9.6 15.1 18.3 22.8 11.5 At the 5% significance level, does there appear to be a difference in the mean for Midwestern and southern households? Note: x, = 16.23 S, = 4.06 = 17.69 2. = 4.42 and K = .05 X >°, n,= 15 ,= 16.23 5, =4.06 M2= 14 7,= 17.69 $2=4.42 Sp (n,-1) s?+(nz-i)s? Step I- H, :M,=Mq Hai M, #Mz step 2: L = df = nit ngrZ Stet 4 : Cristical Valme = ( Two-sided test) Step 5: Compare test statistic to coitical value 2o you rejeet Null or Do not veject Null ? Step 6 : Wmite your conelusion below;
Realiza a Post-Hoc and interpret the results. Were they significant?
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 these scenarios means that a pretest-posttest design with a non-equivalent control group is not suitable? Select all that apply. O a. All of the available participants will be receiving the intervention at the same time. O b. Authors want to examine for any trends in the data over time. O c. The participants were placed into the experimental and control groups by natural circumstances rather than random assignment. O d. Authors want to compare averages between two groups before and after the intervention using an ANOVA.
6 7.5 8 8.5 8.5 6.5 5 5 7.5 8 7 6.5 4.5 7.5 7 7 7 6 6 8.5 It is reported that the average hours that college students study each week is 7.5 hours. Here is a sample of the hours of sleep of 20 random college students. A)Is there enough at the 2% level that the average hours a college student studies each week is greater than 7.5 hours? Show work. B) Hypothesis: C) Show what is given: D) List your Ho and Ha: E) Prepare and Check conditions 1-3 (show work): F) What is the critical value from the table? G) Compare you p-value to the significance level: H) Interpret and wire conclusion: I) Confidence interval conditions 1&2: J) We are __% confident the average hours a college student studies each week is between ___ to ___ hours.
In a one-way analysis of variance with three treatments, each with five measurements, in which a completely randomized design is used, what is the degrees of freedom for treatments? a. 5 b. 2 c. 4 d. 8
1. Write a complete paragraph in APA format describing the research question and your results. Question: A social psychologist records the number of outbursts among students at two schools. Assuming the same number of students were observed at each school, what is the sample size at each school, the decision to retain or reject the null hypothesis) and the effect size for this study based on the following statement? The number of outbursts among students at the small school (M=3) was significantly less than the number recorded at the large school (M = 5) f(38) =4.19, p < .05(d = 0.25 ). Results: sample size = 20 for each school For a two tailed test and df = 38, at 0.05 significance level, t = 2.023 (from t distribution table) Here, the critical value is less than t obtained (t2.023 < 4.19) Hence, we reject the null hypothesis at a 5% significance level Given that d = 0.25 => effect size is medium (since 0.2<d<0.8 for medium) Therefore, the study showed a medium…
Results on seat belt usage from the 2003 Youth Risk Behavior Survey were published in a USA Snapshot on January 13, 2005. The following table outlines the results from the high school students who were surveyed in the state of Nebraska. They were asked whether or not they rarely or never wear seat belts when riding in someone else's car. Using ? = .05, does this sample present sufficient evidence to reject the hypothesis that gender is independent of seat belt usage? Female Male Rarely or never use seat belt 206 323 Uses seat belt 1220 1157 (a) Find the test statistic. (Give your answer correct to two decimal places.)(ii) Find the p-value. (Give your answer bounds exactly.) ______< p < ________
A school psychologist is interested in whether or not teachers affect the anxiety scores among students taking the Statistics exam. The data below are the standardized anxiety test scores for students with the three different teachers. Teacher’s Name Ms. San Pedro Ms. San Juan Ms. San Jose 8 23 22 10 14 18 12 12 14 11 8 22 13 15 22 15 16 10 16 14 11 17 19 9 9 10 10 13 Perform an analysis of variance at the 0.05 level of significance.
Consider the following sample information for three treatment groups. Treatment 1 Treatment 2 Treatment 3 $8 $3 $3 6 4 10 4 5 3 4 Using the 0.05 significance level, test the null hypothesis that the three treatment means are equal.
Which of the following is/are TRUE at 5% level of significance? I. We can assume independence of errors since the subjects were randomly assigned to one of the three diets. II. We have sufficient evidence to say that the data are not normally distributed for each diet.A. I only B. II only C. Both I and II D. Neither I nor II

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