Which of the following is true about the homogeneity of variances assumption?     You need to obtain a new set of data     You must calculate Cohen's d     If unequal, you should exclude some participant data     It cannot be violated if you want to conduct an independent samples

Q: An experiment samples two independent populations X and Y. • X is sampled 26 times yielding sample…

A: Provided information is ; For sample 1: sample size(n1) =26          ,sample mean( x¯)=34.1  ,…

Q: A Levene's test is significant at p-value < 0.05. Which can we conclude? The variances are not…

A: Null Hypothesis: H0: The variances are equal. Alternative Hypothesis: H1: The variances are not…

Q: If y = {12, 3, 6, 6, 19, 5, 7, 2, 4, 6} is a population of scores then: The variance =…

A: From the provided information,The data values are as follow:y = {12, 3, 6, 6, 19, 5, 7, 2, 4, 6}n =…

Q: Question 18

A: The independent t-test assumes the variances of the two groups we are measuring are equal in the…

Q: The Analysis of Variance (ANOVA) is used to determine if there is a difference between a selected…

A: ANOVA, the analysis of variance is the technique used to check if there is significant difference…

Q: Now let us say we want to know where the source of this variance is coming from (which group(s)…

A: Solution: The given claim is that there is a difference in number of IG followers just between…

Q: A carbonated soft drink dispenser is used to fill cups with soft drinks. A random sample of 20 cups…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: Compare and contrast the independent t-test and the analysis of variance. How are they similar and…

A:

Q: Suppose we want to test that the average age of The following table shows the Excel output for this…

A:

Q: TRUE OR FALSE. a. Pearson correlation coefficient is an example of a non-parametric test. b.…

A: a) False

Q: I used the correct excel table and got all the answers on point and still struggle to find the one…

A: Given that The anovo table Formula for F F=MSTreatment/MSError

Q: 2) 2-independent samples t-test is used to compare two samples to each other (like males to females,…

A: 2) The data shows the heart rate for male and female students.

Q: please explain thoroughly the Test of Homogeneity of Variances and Why Post Hoc Tukey HSD is the…

A: Given Information: Consider the given output that shows descriptive statistics, the results for the…

Q: QUESTION 15 When do we reject the null hypothesis in a Chi-square test for independence? O When the…

A: Question 15 Decision rule: If test statistic &gt; critical value, then reject the null hypothesis.…

Q: 2.058

A: For Porsche Driver: sample size (n1) = 16 sample mean (x̄1) = 50 sample variance (s1)2 =9 For…

Q: 6. Comparing Two Population • Comparing Two Population Variances • The two samples are randomly…

A: Statistics is defined as the collection, presentation, interpretation of the data and presentation…

Q: How would Interpret the following  data using two sample t-testing if unequal variances? Each of…

A: From the given Excel output, the t test statistic is 5.6086 and the p-value for the two tail is…

Q: 10. Consider the following questions concerning the sample variance: (A) Is it possible for a…

A: Solution

Q: For tests of Homogeneity of Variance the preferred outcome is to reject the Null hypothesis. True…

A:

Q: Sample Variance of 10, 12, 19, 21, 17 are?

A: Here, the sample size, n is 5. The mean is calculated below. x=∑i=1nxin=10+12+19+21+175=15.8

Q: Miles (1000s of miles) Mean 150.7 Variance 4.661 Observations 46 Hypothesized Mean 150 45 p = Ex…

A: Find  p value, degree of freedom, n abd test statistic, sample mean and sample standard deviation,…

Q: The topic is t test. Question : Assume the variance of two groups is equal, please make a the…

A: Hypothesis test are used to compare the sample and the population. If the sample size is large and…

Q: the life of two brands of canned tires durability is a feature of interest to the manufacturer.…

A: (a) The hypotheses are given below: H0:σ12=σ22Ha:σ12≠σ22

Q: Last school year, the student body of a local university consisted of 35% freshmen, 25 % sophomores.…

A: Claim : significant change in % of students for each classification for this year as compared to…

Q: Take the variable Car as a random block. Do different additives have significantly different effect…

A: Here, we have cars as additive and also another car variable.  Conducting a one way ANOVA on the 9…

Q: Two different box-filling machines are used on an assembly line. The critical measurement influenced…

A: The variance of the distribution of the weight (in ounces) of the product, σ2=1.The sample size for…

Q: Relative to a balanced ANOVA an unbalanced ANOVA: Is typically more sensitive to non-uniform…

A: In ANOVA a balanced design has an equivalent number of observations for all possible factor-level…

Q: In a completely randomized design, 12 experimental units were used for the first treatment, 15 for…

A: Obtain the missing values in the ANOVA table. The missing values are obtained below as follows:…

Q: Homogeneity of variances, one important assumption for using parametric tests, can be assessed by…

A: Here we need to find the correct choice for given statement.

Q: A One-Way ANOVA was conducted and the researcher tested the assumption of homogeneity of variances.…

A: Solution:  For every statistical parametric test required some assumption.  1) Assumption of…

Q: (a) State the type of data collection involved in the given case study. Justify your answer. (b)…

A: For previous version : Sample Mean 1 (Xˉ1)(\bar X_1) = 5.95.9 Sample Standard Deviation 1…

Q: Is it possible for a variance to be negative? (yes or no) Under what conditions does the variance…

A: Introduction: For a population with N observations, x1, x2, ..., xN, the population variance is:…

Q: if variances are unequal, which would be an alternate non-parametric test for the independent…

A: When the variances are unequal, Mann-Whitney U Test would be an alternate non-parametric test for…

Q: A Levene's test is significant at p-value < 0.05. Which can we conclude? The variances are not…

A: It is given that "A Levene's test is significant at p-value&lt;0.05."

Q: What is the value of the df(Groups)?

A: There are four groups with each of 7 observations.

Q: Conduct the following hypothesis test at a=0.05. HO: Mean Age Porsche Drivers Mean Age Ferrari…

A: Given that  Sample sizes n1=16 , n2=16 Sample means x1=50 , x2=47

Q: A Paired t-Test reduces to the Chapter 9 case of hypothesis test on a mean, variances unknown. True…

A: A hypothesis which is tested for plausible rejection is called the Null Hypothesis (typically…

Q: The aim of a study is to test the ratio of variances in the weight of two groups of rats being under…

A:

Q: True or false: In order to use the unpooled t-test, we need to assume that the two population…

A: In order to use the unpooled t-test, we need to assume that the two population variances are…