ntained in the numerator of the test (Z) a. how cach variable (X and Y) cause ch

Question

ntained in the numerator of the test (Z) a. how cach variable (X and Y) cause changes in a third variable b. how each variable (X and Y) vary separately how each variable (X and Y) co-vary together d. how each variable (X and Y) cause each other 25.) What does the coefficient of determination () measure? a. the direction of a relationship he form of a relationship roportion of variability in one variable that can be determined from the relationship with the proportion of variability in one variable that cannot be determined from the relationship with of the following information CANNOT be interpreted when using a correlation? e causal relationship between the two variables d. 26.) Which l. predicted values (using regression) outside of the range of those observed in the original san c. the relationship between two variables when outliers are present d. all of the above cannot be interpreted 27.) Which of the following are general uses for correlations? a. for making predictions about one variable based on another b. for validating psychometric tests (such as an IQ test) c. for a assessing the reliability of psychometric tests (such as an 1Q test) d. all of the above udent's age and the r grade for ea d conducts a Pearson correlation in order to assess the significance of this relation 28.) A psychology professor wants to see if there is a relationship between a st received in her course. The professor measures both the age (in years) and percentage 100 stu dents an ion, what is the degrees of freedom for this hypothesis test? a. 99 b. 98 c. 2 d. 1 29) Which of the following are TRUE of statistical reliability and statistical validity? ime a. reliability evaluates the extent to which the same scale is consistent across t b. validity evaluates the extent to which the scale is measuring the intended construct correlations may be used to evaluate both validity and reliability d. all of the above are true c. SCANTRON

Explanation / Answer

(27)

Correlation is used in all of these cases, so the correct answer is ALL OF THESE

(28)

Formula for calculating the degrees of freedom for correlation coefficient calculations is:

df = n-2

Here, n = sample size

So,

df = 100-2 = 98

(29)

All the given options are correct.

Hope this helps !

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