Variance between samples - Study guides, Class notes & Summaries

1. Factorial Design - Has at least two factors (IVs), each with at least two levels - Two IVs can be examined simultaneously 1. Advantages of Factorial Design - More economical in terms of participants - Allows us to examine the interaction of independent variables (assess generalisability) 1. Interactions in Factorial Designs - One IV interacts with another when the effects of one are different depending on the level of the other - And when it changes (moderates or qualifies) the impact of a ...

PS 307 Exam | Questions with complete solutions A variable for which there is an infinite number of values between any two points on the scale is a ________ variable. a) Discrete b) Ratio c) Continuous d) Confounding A medical researcher interested in asthma symptoms wanted to know how symptoms were affected in dry versus humid conditions. The researchers recruited 18 asthma patients to spend four weeks under two conditions: sleeping with a dehumidifier for two weeks to create a "dry" enviro...

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Stats 571 test 1 Questions and Answers 100% Accurate 1. What distinguishes between nominal, ordinal, interval, and ratio variables? NOMINAL - When two things that are equivalent in some sense are given the same name or number but there are more than two possibilities. (1-10 in sports jerseys) ORDINAL - When categories are ordered. It tells us that things have occurred and the order it occured. (1st, 2nd, 3rd winner) INTERVAL - is a continuous variable. is a measurement where the difference b...

BUAN 6312 Exam 2 Questions and Answers Graded A+ Question: What is the purpose of hypothesis testing in statistical analysis? Answer: Hypothesis testing is used to determine if there is enough statistical evidence to support a specific hypothesis about a population parameter. It helps in making inferences or decisions based on sample data. Question: What are Type I and Type II errors in hypothesis testing? Answer: A Type I error occurs when a true null hypothesis is incorrectly re...

National Counselor Study Summary Latest Convergent Validation - Refers to times when there is a high correlation between the concept the test is meant to study and OTHER constructs. Bergan's Behavioral Model of Consultation - Four Stages: - - Problem identification - Problem analysis - Plan implementation - Problem evaluation Consultation is used when counselors would like to function more effectively in individual, group, or community settings. Bergen's model uses a BEHAVIORAL APP...

Expectancies -beliefs about our ability to perform an action and to get the desired reward A placebo effect -depends on a participants belief in the effectiveness of the independent variable What is the primary method of behaviourism? -Experimental method Reliability in a Measurement -is the measure's tendency to give the same result from one occasion to the next Three principles that underlie critical thinking - scepticism, objectivity, open-mindedness Testing Hypothesis - context of ju...

The _______________ for multiple linear regression do not have constant variance. - sample residuals How much all the values in the model change when the ith value is removed is known as what? - Cook's distance The ______________ for multiple linear regression have constant variance. - error terms QQPlot and histogram are used to assess what in MLR? - normality Residuals vs predictor are used to predict what in MLR - linearity Residuals vs fitted values are used to assess what in MLR - c...

Uses of statistics - correct answer -Used to organize and summarize information -Used to determine exactly what conclusions are justified based on the results that were obtained Statistics: - correct answer set of mathematical procedures for organizing, summarizing and interpreting information Goals of statistical procedure - correct answer Accurate ...

The number of degrees of freedom of the χ 2 (chi-square) distribution for the pooled variance estimator is N − k + 1 where k is the number of samples. - False If the confidence interval for a regression coefficient contains the value zero, we interpret that the regression coefficient is definitely equal to zero. - False. The coefficient is plausibly zero, but we cannot be certain that it is If one confidence interval in the pairwise comparison in ANOVA includes zero, we conclude that the...