Based on the ANOVA table given, is there enough evidence at the 0.01 level of significance to conclude that the linear relationship between the independent variables andthe dependent variable is statistically significant?ANOVASourcedfMSFSignificance FRegression975.230086487.6150436.9287840.009990Residual12844.50324770.375271Total141819.733333Copy DataAnswer画 Tables国 KeypadKeyboard ShortcutsO YesO No

The significance value is 0.009990.

Answered: Based on the ANOVA table given, is…

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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Based on the ANOVA table given, is there enough evidence at the 0.010.01 level of significance to conclude that the linear relationship between the independent variables and the dependent variable is statistically significant? ANOVA Source df SS MS F Significance F Regression 44 1497.913550 374.478388 6.202901 0.007290 Residual 1111 664.086450 60.371495 Total 1515 2162
Find the critical value for a test for correlation with α = 0.05 for a sample size of 21.
At .05 significance level with a sample size of 4, find the critical value for the correlation coefficient
A new math program was evaluated using four groups of students. Treatment group 1 had 10 elementary students. Treatment group 2 had 12 middle school students. Treatment group 3 had 10 high school students, and treatment group 4 had 15 students that were homeschooled. Complete the ANOVA table below and use it to conduct a 4-step hypothesis (ANOVA) test to determine if there is sufficient evidence to conclude the new math program made a significant change in mean scores at α=.05 source of variation SS df MS F treatment 360 error 516 total On all hypothesis test: 1) clearly state the null and alternative hypotheses; 2) sketch a graph of the rejection region labeled with the critical value; 3) calculate the test statistic (showing work) and p-value (give a range for t, chi-square, and F), and 4)using evidence state a detailed conclusion.
At a .05 significance level with a sample size of 19, find the critical value for the correlation coefficient. (Just enter the positive value rounded to three places.)
A standardized math test was administered to two groups of 5th graders, one group sampled from classes whose teachers had followed the existing curriculum and one group sampled from classes whose teachers had followed a new curriculum, and the scores were compared using a t-test with the following results: Old Curriculum New Curriculum Mean 75.31914894 75.4893617 Variance 118.613321 33.8640148 Obervations 47 47 Hypothesized Mean Difference 0 df 70 t Stat -0.094501437 P(T<=t) 0.46 t Critical one-tail 1.666914479 P(T<=t) two-tail 0.92 t Critical two-tail 1.994437112 You decide to use the conventional p=.05 as your…
A toothpaste manufacturer claims that children brushing their teeth daily with his company’s product (brand A) will have fewer cavities than children using brand B. In a carefully supervised study, the number of cavities in a sample of 5 children using brand A toothpaste was compared with the number of cavities in a sample of 5 children using brand B toothpaste. Using the information below, assess whether there is a significant difference in the mean number of cavities across the two groups. Use an alpha level of .05. Obtained value: Critical/ cut-off value: Conclusion: Brand A Brand B Mean = 1.1 Mean = 4.3 SS = 12 SS = 10
if a researcher undertook an experiment to evaluate the efficacy of a memory enhancement technique among a cohort of 15 college students. The memory recall abilities of each student were assessed both before and after they underwent training in the memory technique. The observed average increase in memory recall scores following the training was 5 points. The sample variance of the differences within the entire sample was denoted as 8. Does this research question aim to ascertain whether there is a statistically significant elevation in memory recall scores after the implementation of the memory improvement training? To address this question, a one-tailed test with a significance level of (alpha = 0.01) is employed.
A standardized math test was administered to two groups of 5th graders, one group sampled from classes whose teachers had followed the existing curriculum and one group sampled from classes whose teachers had followed a new curriculum, and the scores were compared using a t-test with the following results: Old Curriculum New Curriculum Mean 65.06382979 66.5106383 Variance 822.4523589 127.5161887 Obervations 47 47 Hypothesized Mean Difference 0 df 60 t Stat -0.321814324 P(T<=t) 0.37 t Critical one-tail 1.670648865 P(T<=t) two-tail 0.75 t Critical two-tail 2.000297822 You decide to use the conventional p=.05 as your…
What source of variation is found in an ANOVA summary table for a within subjects design that is not in an ANOVA summary table for a between subjects design. What happens to this source of variation in a between-subjects design?
What is the value of tobt for the independent samples?
In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of low-density lipoprotein (LDL) cholesterol (in mg/dL) have a mean of 0.4 and a standard deviation of 21.0 Use a 0.05 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. a) Specify the null hypothesis, alternative hypothesis. b) Find the test statistic. c) Based on critical value(s), state the conclusion about the null hypothesis. d) State the final conclusion that addresses the original claim. e) What do the results suggest about the effectiveness of the garlic treatment? As a personal question added on, how do you know which test to use to find the test statistic, I always struggle with that?

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