PSY 202 Homework 1 KEY.pdf - This material may not be distributed without the explicit consent from its author Dr Nick Prins Homework 1 PSY 202 Prins

# PSY 202 Homework 1 KEY.pdf - This material may not be...

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Homework 1. PSY 202 Prins. 69/69 = 100% Name: Nick Prins Write your final answers on the lines. Show your computations. 1. For the following variables determine the level of measurement and whether the variable is discrete or continuous 1 pt each for total of 8 The time it takes a rat to run a maze RATIO, CONTINUOUS Rank in the Army RANK-ORDER, DISCRETE Number of students enrolled in PSY 202 RATIO, DISCRETE Race (as in Asian, etc.) NOMINAL, DISCRETE (continuous is defendable) 2. How would the following mathematical operation be expressed in summation notation? "Add two to each score, square the resulting values, then add these squared values." 2 points a. X + 2 2 b. ( X + 2) 2 c. (X + 2) 2 d. X 2 + 2 __ C __ 3. What about this one: “Divide each score by 3, sum the resulting numbers, thensquare the sum”? 2 points a. (∑X)2 / 3 b. (∑X/3)2c. ∑(X/3)2d. ∑X/32__B__ 4. Given the following data:XYX2XYY2XY2X – M(X – M)2 3 5 9 (3x5) 15 25 (3x25) 75 -0.4 0.16 4 1 16 4 1 4 0.6 0.36 5 8 25 40 64 320 1.6 2.56 3 9 9 27 81 243 -0.4 0.16 2 6 4 12 36 72 -1.4 1.96 17 29 63 98 207 714 0 5.2 This material may not be distributed without the explicit consent from its author, Dr. Nick Prins

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