Question 1 Which of the following correlation coefficients indicates the weakest relationship between two variables? That is,which one permits the least accurate predictions of one variable from the other?a. +.5b. 0c. -.5d. +.1 Show
Question 2 Which of the following structures controls muscles in the head (such as those used to chew and swallow)? Get answer to your question and much more 2 pointsQuestion 3For a variety of reasons, many scientists recommend that instead of (or in addition to) stating the p value, researchers shouldshow the means and:Answer Get answer to your question and much more
2 pointsQuestion 4Nearly all medical and recreational drugs that modify people's experiences exert their effects atAnswer Get answer to your question and much more c. synapses.d. hormonal glands.2 pointsQuestion 5When a food is paired with a later illness, people often develop an aversion to that food. Which is true about that aversion?Answera. It is most likely to occur with foods you eat often but think taste bland.b. It will develop only if it was actually the food that made you ill, and you know it was the food that made youill.c. It will develop only if it was actually the food that made you ill, even if you thought something else caused theillness.d. It is most likely to occur if you are unfamiliar with the food that preceded the illness. 2 pointsQuestion 6The theories of Sigmund Freud haveAnswer Get answer to your question and much more 2 pointsQuestion 7The structure of a neuron, in terms of the shape of its axon and dendrites,Answer Get answer to your question and much more c. is flexible during infancy, and then becomes constant.d. is flexible throughout life.2 pointsQuestion 8A cognitive psychologist who tries to explain differences in performance among individuals will probably concentrate on howthose individuals differ in theirAnswer Get answer to your question and much more 2 pointsQuestion 9Ethical standards for the treatment of participantsAnswera. have been established by the APA.b. are left up to the individual experimenter.c. are followed by only a small minority of psychologicalresearchers.d. exist for human participants, but not for animal participants. 2 pointsQuestion 10An increased need for sodium salts in the body can be caused by damage to theAnswer Get answer to your question and much more c. adrenal gland.d. thyroid gland.2 pointsQuestion 11Because researchers have found that different brain areas control vision, hearing, touch, and so forth, a new theoretical questionhas arisen:Answer Get answer to your question and much more Upload your study docs or become a Course Hero member to access this document Upload your study docs or become a Course Hero member to access this document End of preview. Want to read all 17 pages? Upload your study docs or become a Course Hero member to access this document The correlation coefficient is a measure that describes the direction and strength of the linear relationship between two quantitative variables. … The correlation coefficient measures the strength and direction of the linear relationship between two variables. The two variables must be quantitative. Correlation refers to a measure of how strongly two or more variables are related to each other. … Positive Correlation: A positive correlation means that high values of one variable are associated with high values of the other. Or if you like, the variables increase together. What does the correlation coefficient measure?The correlation coefficient is the specific measure that quantifies the strength of the linear relationship between two variables in a correlation analysis. What does the correlation coefficient indicate quizlet?The correlation coefficient, often expressed as r, indicates a measure of the direction and strength of a relationship between two variables. When the r value is closer to +1 or -1, it indicates that there is a stronger linear relationship between the two variables. What does the square of the correlation coefficient measure quizlet?The square of the correlation coefficient; indicates the proportion of variance in one variable that can be accounted for by the other variable. … An index of the direction and magnitude of the relationship between two variables. Negative Correlation. Indicates an inverse negative relationship between two variables. What is the formula of Karl Pearson’s coefficient of correlation?The Pearson correlation coefficient is symmetric: corr(X,Y) = corr(Y,X). A key mathematical property of the Pearson correlation coefficient is that it is invariant under separate changes in location and scale in the two variables. How do I calculate the correlation coefficient?The correlation coefficient is determined by dividing the covariance by the product of the two variables’ standard deviations. Standard deviation is a measure of the dispersion of data from its average. How would you interpret a correlation coefficient of 1 quizlet?meaning one that’s closer to the value of one, means that the two variables are very strongly related to each other. is thinking that one of the variables caused the other variable. That’s not necessarily true, even if the correlation is a perfect -1.00 or perfect +1.00. What is indicated by a positive value for a correlation quizlet?A positive correlation indicates that X and Y change in the same direction. As X increases, Y also increases. A negative correlation indicates that X and Y tend to change in opposite directions: As X increases, Y decreases. Which is a perfect correlation quizlet?A correlation will have a value between -1 and +1. A correlation of 0 means that there is no relationship. A +1 means that there is a positive “perfect correlation” between two, and a -1 means that there is a negative perfect correlation. Which is strongest an r of .75 or an R of?
Which value of R indicates a stronger correlation than 40?Taking the absolute value of the correlation coefficient measures the strength of the relationship. A correlation coefficient of r=. 50 indicates a stronger degree of linear relationship than one of r=. 40. Which of the following correlation coefficient indicates the strongest relationship?Answer: -0.85 (Option d) is the strongest correlation coefficient which represents the strongest correlation as compared to others. What is wrong with the following definition of the correlation coefficient?What is wrong with the following definition of the correlation coefficient? The correlation coefficient measures the strength and direction of the linear relationship between two variables. The two variables must be quantitative. … There is no linear relationship between the two quantitative variables. What does a correlation coefficient of 0 indicate?A correlation coefficient greater than zero indicates a positive relationship while a value less than zero signifies a negative relationship. A value of zero indicates no relationship between the two variables being compared. What does a correlation coefficient of indicate about two variables quizlet?The correlation coefficient is reported on a scale between 0 and 1. The further the coefficient is from 0 (the closer to +1 or -1), the stronger the relationship, that is, the larger the effect. Zero indicates no relationship. … The + and – signs of between 0 and 1 indicate the direction of the relationship. Which of the following correlation coefficients indicates a perfect negative relationship?A correlation coefficient of -1 indicates a perfect negative correlation. As variable x increases, variable z decreases.
Which of the following correlation coefficients indicates a perfect relationship?CORRELATION COEFFICIENT BASICS
0 indicates no linear relationship. +1 indicates a perfect positive linear relationship – as one variable increases in its values, the other variable also increases in its values through an exact linear rule.
Which of the following represents a perfect negative relationship?In statistics, a perfect negative correlation is represented by the value -1.0, while a 0 indicates no correlation, and +1.0 indicates a perfect positive correlation.
Which is strongest an r of .75 or an r of?The correlation between two variables is considered to be strong if the absolute value of r is greater than 0.75. However, the definition of a “strong” correlation can vary from one field to the next.
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What is Considered to Be a “Strong” Correlation?. |
Which of the following correlation coefficients indicates a perfect negative relationship? quizlet
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