1. Why should you use ANOVA instead of several t tests to evaluate mean differences when an experiment consists of three or more treatment conditions?

Q: .What percentage of females are smokers?  2.What percentage of people who do not smoke are males?…

A: Cross tabulation helps a researcher to analyze the results of bivariate relationship between the…

Q: If the estimated power of a significance test is 0.6, it means that

A: The power of a significance test is basically the probability of not making type 2 error. The type 2…

Q: Why should you use ANOVA instead of several t tests to evaluate mean differences when an experiment…

A: T-test: The type of test in inferential statistics helps to find whether there is any difference in…

Q: What is H0 for a one-way ANOVA? If H0 is rejected, does that imply that each mean is significantly…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: Could you please help me understand the difference between a z-test and a t-test for in statistics?

A: Both the tests are useful to test the significance of means.Both the tests are assume a normal…

Q: What is the similarity between one-way ANOVA and a t-test?

A: Answer: A

Q: State the statistical hypotheses (null and alternative) for a two-tailed test against a known…

A: In this context, the known population mean is 90.

Q: Select a significance level α and reject the null-hypothesis if the p-value is less than α. Explain,…

A: Correlation: The correlation coefficient explains the relationship between two quantitative…

Q: What statistical test should she use to analyze the data?

A:

Q: An ANOVA  is used to evaluate the mean differences among three treatment conditions with a sample of…

A: It is given that the number of treatments, K is 3.Total number of observations is (12 x 3) = 36.

Q: To help assess the health risks of second-hand smoke, the levels of cotinine (a metabolite of…

A: Given Information: The levels of cotinine (a nicotine metabolite) in the urine of seven volunteers…

Q: Suppose you would like to determine if the mean score for the first round of a golf tournament event…

A: Here we have paired data so paired t test will be used.

Q: Which of the following would decrease the value of the test statistic when dependent samples or…

A: Note: Since the options are not provided we have given the general answer. Please provide answer…

Q: When should you use a one-way ANOVA to analyze your data? Distinguish between one–way ANOVA for…

A: ANOVA compares one or more population mean scores with each other on the basis of the sample data;…

Q: (a) Classic ANOVA vs GLIM in comparing population means. 1-2pages

A: Mathematically, they may have similar results. But their conceptual usage differs. In case of ANOVA,…

Q: If a P-value is .043, what does that mean in terms of the value obtained for the test statistic?

A: p-value is the probability of obtaining more extreme results under  null hypothesis, by more extreme…

Q: Are Republicans more likely than Democrats to display the American flag in front of their residence…

A: Given Information: Republicans: Sample size (n1) = 679 Out of which x1 = 448 displayed the flag on…

Q: What is the observed significance level for this test?

A: here given , n= 50  sample mean  =  19.4  sample standard deviation  =  3.1

Q: What is the key difference between an independent and a dependent samples t-test?

A: Solution-: What is the key difference between an independent and a dependent samples t-test?

Q: The following question is from Interpreting Basic Statistics by Holcomb 8th edition: - How many…

A: Given Theoretical question

Q: Describe the difference between a two-sample (independent) t-test and an ANOVA (in terms of what…

A: Comparison of two sample t test and ANOVA

Q: A researcher studying psychological well-being between those with depression, anxiety, or mood…

A: Given Information- Number of individuals for each type of psychological well-being are Depression =…

Q: What are some assumptions researchers may have about a related-samples t-test?

A: Correlated samples t-test or matched pairs t-test or repeated measures t-test: The paired t-test or…

Q: What is the formula for STANDARDIZED EFFECT SIZE, COHEN’S d (TWO INDEPENDENT SAMPLES)?

A:

Q: w is it used to conclude there is a statistically significant difference between the mean of…

A: The test which gives global assessment for statistical difference for 2 independent means called…

Q: Why would a researcher choose to conduct an One-Way ANOVA rather than multiple independent samples…

A: Solution-: Why would a researcher choose to conduct an One-Way ANOVA rather than multiple…

Q: A. If the results were statistically significant, can the results of this study be generalized to a…

A: The study involved 350 volunteers over the age of 60 years. Each subject was assigned to a treatment…

Q: What statistical method would you use when your variables are nominal and your measure of central…

A: Nominal variables are qualitative variables with categories having no natural ordering in it. For a…

Q: one-way between subjects ANOVA produces dftotal = 29 and dfwithin = 27. For this analysis, how many…

A: From the given information, Consider, from the one way ANOVA, Dftotal =29, Dfwithin =27 Thus, the…

Q: a researcher peformed the Mann-Whitney test and found a significant difference between psychologists…

A: Since, the population standard deviation known. Therefore, the value of z should be taken from…

Q: Why is the unbiased estimator of variance used?

A: the unbiased estimator of the population variance, corrects the tendency of the sample variance to…

Q: 1.Explain why there is a potential problem in the ANÓVA analyses when the variances are not equal.…

A: ANOVA (ANALYSIS OF VARIANCE)…

Q: Describe one of the two scenarios in which a related samples t-test is the appropriate test of…

A: Two samples are said to be independent if the sample values selected from one population are not…

Q: At the a Y 0.05 significance level, what is the most appropriate conclusion to draw from this test?

A: To make decisions about hypothesis, we make comparison of p-value and level of significance.

Q: Show the difference between two approaches to significance testing?

A: The two approaches to significance testing are p-value approach and critical value approach.

Q: If we were going to perform a hypothesis test for the population mean with Ho : µ> 1200 vs H : u<…

A: Given information: μ=1200, σ=400, n=50α=0.05 H0 : μ≥1200HA : μ&lt;1200 The given hypothesis test is…

Q: Explain why you should use ANOVA instead of several t tests to evaluate mean differences (i.e.…

A: T-test is used to compare the means between two samples, but if there is more than 2 conditions in…

Q: What is the relationship between the t-test and the sample size? (

A: Here identifying the relationship between t test and sample size

Q: Explain why is it important to use ANOVA instead of several t tests to evaluate differences between…

A: Using several t -test, increase the type I error. In anova type I error is less as compare to t-test…

Q: 2) A researcher suspects that there is a relationship between substance use and sexual activity…

A: In statistics, for analysis purposes, we collect the data. According to the objective of the survey…

Q: Can you think of any flaws in the One-Sample Z-Test for Mean?

A: Introduction: Suppose the true, unknown mean of a population of interest is μ.

Q: 5% is a very common significance level for significance tests, but it Is arbitrary

A: Level of significance helps researcher to make decision about the null hypothesis.

Q: 3. If instead we use a 1% significant level, the results v [ Select ] statistically significant. are…

A: As per instruction, we are asked to solve part 3 only Given Data :

Q: How does an observed sample mean qualify as a rare outcome?

A:

Q: In a t-test of difference between means, increasing sample size will affect the:

A: In t-test difference between the means, the Statistical significance is determined by the size of…

Q: observed data set.

A: What is a two-tailed test? First let’s start with the meaning of a two-tailed test.  If you are…

Q: A research organization wishes to determine whether the driving range of different electric cars on…

A: Here, the test is conducted to determine whether the driving range of different electric cars on a…

Q: Two samples each with n =5 scores has a pooled variance = 40. What is the estimated standard error…

A: The formula of the estimated standard error for the sample mean difference is,

Q: It states that there is significant difference between the observed and expected data.

A: Alternative Hypothesis

Q: One advantage of a within subjects ANOVA is that the participants serve as their own comparisons…

A: Here we want to know given statement is correct or not.