Does the overall alpha level change if you use a one-tailed test vs. a two tailed test? why or why not?

Q: Do dominant and subordinate individuals differ in the means of giggle spectral CV?

A: For Group : Dominant Individual Standard Deviation, s: 0.05410 Count, N: 9 Sum, Σx: 2.755…

Q: When conducting a significance test for correlation, if your null and alternative hypothesis are:…

A: Test is that whether or not the correlation is significant.

Q: What is the “directionality” problem concerning correlational studies as it relates to inferring…

A: ExplanationIn correlational studies, one of the major problems that make difficult for us to infer…

Q: The two types of variance that can occur in our data are A. Independent and dependent

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: Why does a large value of the F statistics provide evidence against the null hypothesis?

A: We use F-statistic (F ratio) when we are comparing the group means like ANOVA test for for more than…

Q: What is the best correlational test to use in SPSS for a research sample size of 39?

A: A correlation coefficient is a value that shows how closely two sets of measurements are related. It…

Q: Explain what Analysis of variance (ANOVA) is and when we can use it.

A: Introduction :-  ANOVA :-  Analysis of variance is the " Separation of variance ascribable to one…

Q: give one disadvantage of using experience sampling and one advantage of using correlational methods…

A: Disadvantage of using experience sampling Despite the strengths and promise of this method, there…

Q: Determine whether statement is true or false, and explain why. A correlation coefficient of zero…

A: The given statement is  A correlation coefficient of zero indicates a perfect fit with the data.

Q: How is the analysis of variance (ANOVA) specifically the F-Test, a signal to noise ratio?

A: ANOVA is a study which is non parametric. ANOVA stands for "Variance Analysis" and is used to…

Q: What do the MS values represent in an ANOVA?

A: ANOVA is Analysis of Variance.

Q: What is an alpha level? What is a p-value level? how is a p-value used in relation to an alpha level…

A: Alpha Level: The alpha level is defined as the probability of rejecting the null hypothesis when the…

Q: Can the empirical rule be used on any population, why or why not?

A: Empirical Rule tells us that approximately every bit of data will be falling within three standard…

Q: Suppose that different amounts of fertilizer had been used in different fields that were involved in…

A: Probability denotes the possibility of the outcome of any random event. The meaning of this term is…

Q: Does the random paired data below show a linear correlation?

A: original claim: there is linear correlation in between x ,y ρ=population correlation coefficient…

Q: Is it possible to use STATcrunch to find the linear correlation coefficient instead of the formula?

A: Is it possible to use STATcrunch to find the linear correlation coefficient instead of the formula?…

Q: Distinguish between Alpha and Beta testing.

A: Let AT denote Alpha Testing. Let BT denote Beta Testing.

Q: If remedial measure is applied to address the problem of multicollinearity in the model, do you…

A: Multicollinearity (MColl) exists when independent variables (IVs) are dependent on each other.

Q: What is the linear correlation, test statistics, and p-value?

A:

Q: In using statistical test in business, business practitioners face two types of errors: type I and…

A: Type-1 and Type-2 Errors: In Hypothesis testing, based on a result of our test, we can reject the…

Q: Does a high positive correlation between smoking and lung cancer and prove that one cause to…

A: Introduction: Correlation: Correlation is a measure of the strength of linear association between…

Q: what happens to the F-statistic if two variances are different?

A: The two variances are different hence the F-statistic are as follows,

Q: Which are the steps involved in the construction of explanatory bivariate tables?

A: Explanatory Bivariate table: A Statistical technique intended to recognize and portray the…

Q: A recent study examined the drinking behaviors of undergraduate college students (male and female…

A: Null Hypothesis is :  (That is, there is no significant difference in the drinking habits of males…

Q: What is negatively correlated?

A:

Q: What does experimental confirmation of a correlation?

A:

Q: Below are several research scenarios. Indicate which set of statistical analyses (e.g., ANOVA,…

A: a) Here, we have three groups and we have see if the difference in this groups is significant and…

Q: A SAMPLE SIZE OF 36 WAS DRAWN AND ITS MEAN WAS FOUND TO BE 80. TEST WHETHER THIS SAMPLE COULD HAVE…

A:

Q: A program administrator at a high school wanted to see if there was a significant association…

A: Given : Anxiety Verbal Abuse 7 3 3 1 6 5 4 4 5 2 Significance level (α) = 0.05

Q: What is the correlation coefficient for this data set?

A: The value of r2 is 0.2209.

Q: What does it mean that the variance (computed by dividing by N) is a biased statistic?

A:

Q: A correlation of +.20 means that [blank] of the variance in the outcome variable is accounted for by…

A: Solution: From the given information, r=0.20.

Q: What is the value of Spearman's rank correlation coefficient for the data:

A: To calculate the Spearman rank correlation coefficient, first we rank the observations of both…

Q: Is there sufficient evidence or not to conclude that there is a linear correlation between brain…

A: The P-value is 0.265.

Q: what does MS stand for in analysis of variance?

A: Solution-: What does MS stand for in analysis of variance?

Q: What is the value of Spearman's correlation coefficient for the association between chocolate…

A: Let, "x" and "y" be chocolate consumption and number of Nobel prize winners respectively. The table…

Q: What is another name for the empirical rule? Why is that name appropriate?

A:

Q: Why is the empirical rule useful?

A: The empirical rule, which states that nearly all data will fall within three standard deviations of…

Q: Perform a Two-way Analysis of Variance with Replication in Excel and output the ANOVA table assuming…

A: ANOVA Ouput   Df SS MS F pv-alue Brand 3 0.000413 0.000138 0.786 0.519 as.factor(Time) 3…

Q: Give one method to increase statistical power and Which test statistic should you use if you are…

A: Given problem Given that   Method to increase the statistical power : a) Increase the sample size…

Q: Suppose you receive the following ANOVA output in this study. What is the correct conclusion about…

A: From the given ANOVA output, the F statistic value is F(2,27) = 4.47 and the Sig. value (p-value) is…

Q: What is the “third factor” problem concerning correlational studies as it relates to inferring…

A: The correlation between any two variables is the linear relationship between those variables, but it…

Q: Explain the circumstances under which we would need to pool the variance for an independent samples…

A: The pooled sample variance offers a higher precision estimate of the variance than the individual…

Q: At a .05 “alpha level”, what is the “critical cutoff” z-score for a “two-tailed test”?

A: The critical value is zα/2.

Q: How does increasing the alpha/significance level increase the power of a statistical test?

A: Type 1 error is the error of rejecting a true null hypothesis. This happens when the value of the…

Q: a researcher wants to know if a new drug to fight depression works better than a placebo.…

A: Hypotheses for the test are given below:

Q: What is the power of a study using a correlation, with a one-tailed test at the .05 significance…

A: Here's the explanation is as follows; Power analysis is an important aspect because It allows us to…

Q: Describe how you would randomise observations and why it is important that the service user is…

A: Randomization is critical to success of clinical trial experiments.