Exam 12: Prediction

If the predicted score for a person with a predictor variable score of 1 is 19.5 and for a person with a predictor variable score of 2 is 21.5,the regression coefficient is __________.(Give a number.)

The regression coefficient is the number multiplied by the score on the predictor variable to get the __________ on the criterion variable.(Give a name,not a symbol.)

A researcher was interested in whether college GPA (X)would predict starting salary after college (Y).(For simplicity,salary was converted to a 100-point scale.)The participants' scores were: a.Figure the linear prediction rule. b.Make a graph with the regression line. c.Figure the standardized regression coefficient. d.Explain the logic of what you did to someone who is familiar with correlation,but who knows nothing about prediction.Be sure your answer explains the ideas of prediction,linear prediction rule,best linear prediction rule,the regression line,and the standardized regression coefficient. e.Advanced topic: Figure the proportionate reduction in error using sums of squared errors. f.Advanced topic: Explain the logic behind how you figured the proportionate reduction in error.

The term in a linear prediction rule that represents the intercept of a regression line is

In the equation Ŷ = a + (b)(X),b is the symbol for the

If a person's score on a questionnaire has been found to predict observed social skills,and the linear prediction rule uses a regression constant of 16 and a regression coefficient of 3,the predicted level of social skills for a person with a score of 10 on the questionnaire is

Which assumption is applicable to regression but not to correlation?

In psychology research articles,

The statistical procedure used to make predictions about people's poetic ability based on their scores on a general writing ability test and their scores on a creativity test is

based on the following data for variables X and Y. -The standardized regression coefficient for the best linear prediction rule is __________.(Give a number.)

If a child psychologist reports that age in months predicts appetite level for a group of infants using a linear prediction rule in which a = 1 and b = 2,the appetite level for a four-month-old infant is

Considering the number of possible linear prediction rules for predicting Y from X,for any particular set of scores,

based on the following data for variables X and Y. -To find the standardized regression coefficient for the best linear prediction rule,divide the square root of __________ by the square root of __________,and multiply the result by the unstandardized (ordinary)regression coefficient.(Give numbers.)

An educational psychologist wants to predict how well students will do on a particular multiple-choice test based on a measure of their ability to follow instructions. Their actual scores are 3, 7, and 11, and their respective predicted scores are 5, 7, and 9. -Advanced topic: What is the proportionate reduction in error?

An educational psychologist wants to predict how well students will do on a particular multiple-choice test based on a measure of their ability to follow instructions. Their actual scores are 3, 7, and 11, and their respective predicted scores are 5, 7, and 9. -Advanced topic: What is SS_Error?

Advanced topic: The sum of the squared errors when predicting from the mean is called

A health psychologist surveyed 200 female outpatients at a health maintenance organization and figured a multiple regression prediction rule for predicting compliance (the degree to which patients follow the prescribed medication orders)on a scale from 0 = not at all to 100 = completely.The predictor variables were all rated on 7-point scales with 1 = low and 7 = high. Predicted compliance = 60 + (4)(trust in own doctor) + (10)(trust in doctors generally) - (5)(past bad experiences with medications) A)Figure the predicted compliance for a woman who rated her trust in her own doctor as a 3,her trust in doctors generally as a 3,and her past bad experience with medications as a 7. B)Figure the predicted compliance for a woman who rated her trust in her own doctor as a 3,her trust in doctors generally as a 3,and her past bad experience with medications as a 1. C)Figure the predicted compliance for a woman who rated her trust in her own doctor as a 3,her trust in doctors generally as a 1,and her past bad experience with medications as a 1. D)Explain the logic of what you did,including why the predictions for the three women are different,to a person who is familiar with correlation,but who knows nothing about regression.

The slope of the regression line corresponds to the __________.(Give a name,not a symbol.)

When multiple regression statistics are reported in a psychology research article,

Which of the following is true about hypothesis testing for a linear prediction rule?