What's the purpose of the following ANOVA output from spss? mpgEqual variancesassumedEqual variancesnot assumedLevene's Test forEquality of VariancesF1.61820BIndependent Samples Testt-3.560-3.169df6931.5771-test for Equality of MeansSig (2-tailed).001.003MeanDifference-4.977-4.97781d. ErDifference1.3981.57195% ConfidenceInterval of theDifferenceLower-7.766-8.178Upper-2.188-1.776

The output of the Independent sample test for two samples is given. This test is used for two…

Answered: mpg Equal variances assumed Equal…

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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A researcher would use a one-way within-groups ANOVA to test a hypothesis about levels of depression among three groups of men who are single or never married, seperated, divorce, and married or partnered. False True
State the three assumptions required for a two-way ANOVA. How crucial are these assumptions?
If there is an overall significant F in a one way ANOVA, can we conclude that the group membership or treatment variable caused the observed differences in the group means? Why or Why not?
State the two-way ANOVA identity for degrees of freedom and interpret its meaning with regard to partitioning the total degrees of freedom in the data.
Look at the ANOVA table. These are the results of an experiment that was done to test whether C (soil carbon) would differ after various methods of site prepartation before tree seedlings were planted. To measure carbon in the soil, the 0-5 cm and 6-10 cm topsoil depths were sampled and analyzed for C. Thus, there were 2 depths, 3 treatments sampled about 26 years after site prepartation occured. a. How do we test the significance of ANOVA? b. One of the assumptions of ANOVA is that the variance of Y is the same for all x values (Xi). What is meant by that statement?
1) Create a example of a scenario where a one-way ANOVA would be used in this 2) Give a example of a scenario where an ANOVA with repeated measures would be used in it
Researchers investigate how the presence of cell phones influence the quality of human interaction. Subjects are randomly selected from a population and divided into an experimental group that is asked to leave their phones in the front of the room and a control group that are not asked to leave their cell phones at the front of the room. Subjects are left alone for 10 minutes and then asked to take a survey designed to measure quality of interactions they had with others in the experiment. What statistical test is appropriate?
Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measured in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in ₁ = 290 and s₁ = 12, and another random sample of 16 gears from the second supplier results in ₂ = 321 and s₂ = 22. Is there evidence to support the claim that supplier 2 provides gears with higher mean impact strength? Use a = 0.05, and assume that both populations are normally distributed but the variances are not equal. O a. Because -4.64 < -1.714, fail to reject the Null Hypothesis Ob. None among the choices O c. Reject the Null Hypothesis Od. Because -4.64 < -1.714, reject the Null Hypothesis
State the three assumptions required for a randomized block ANOVA. How crucial are these assumptions?
Data originally from DASL http://lib.stat.cmu.edu/DASL/Datafiles/CancerSurvival.html (Links to an external site.). Some bronchial cancer patients had the following survival times (in days) after receiving a certain treatment: 20, 37, 63, 64, 72, 81, 138, 151, 155, 166, 166, 223, 245, 246, 450, 459. (The second instance of “166” is not a mistake.) Do these numbers suggest that the average survival time, for all bronchial cancer patients who receive that treatment, is significantly different from 200 days? CANCER SURVIVAL Report an appropriate one-sample hypothesis test and use a 10% significance level. For Step 4 of the six-step process that was taught in this class, choose the BEST option to complete the following sentence: We assume that the sample of subjects is a SRS and we assume that the population of observations has no outliers ... and is Normally distributed. and is without a doubt bell-shaped. and is Uniformly distributed. (nothing needs to go here because the sample…
Data originally from DASL http://lib.stat.cmu.edu/DASL/Datafiles/CancerSurvival.html (Links to an external site.). Some bronchial cancer patients had the following survival times (in days) after receiving a certain treatment: 20, 37, 63, 64, 72, 81, 138, 151, 155, 166, 166, 223, 245, 246, 450, 459. (The second instance of “166” is not a mistake.) Do these numbers suggest that the average survival time, for all bronchial cancer patients who receive that treatment, is significantly different from 200 days? CANCER SURVIVAL Report an appropriate one-sample hypothesis test and use a 10% significance level. For Step 5 of the six-step process that was taught in this class, which would be the appropriate procedure and why? Choose the correct option. Group of answer choices We would do a t-procedure because we have the standard deviation. We would do a t-procedure because the sample size is large. We would do a t-procedure because we do not have the population standard deviation and…
The following partially completed ANOVA table approximately matches summary statistics given in the article “From Here to Equity: The Influence of Status on Student Access to and Understanding of Science” (Science Education [1999]: 577–602) . The study described in this article attempted to quantify the effect of socioeconomic status on learning science. The response variable was “Rate of Talk” (the number of on-task talk speech acts per minute) during group work. Data were also collected on the variable socioeconomic status (low, middle, high) and the variable sex (female, male). The author allowed for an interaction between sex and status. Assume that there were 12 students at each status–sex level combination, for a total of 72 subjects. a. Fill in the missing numbers in the ANOVA table. b. Is there a significant interaction between status and sex? c. Is there a difference between the mean “Rate of Talk” scores for females and males? d. Is there a difference between the mean “Rate…

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